[{"file_date_updated":"2024-01-31T11:59:30Z","date_created":"2024-01-28T23:01:42Z","volume":6,"type":"journal_article","month":"01","oa_version":"Published Version","abstract":[{"text":"It is a basic principle that an effect cannot come before the cause. Dispersive relations that follow from this fundamental fact have proven to be an indispensable tool in physics and engineering. They are most powerful in the domain of linear response where they are known as Kramers-Kronig relations. However, when it comes to nonlinear phenomena the implications of causality are much less explored, apart from several notable exceptions. Here in this paper we demonstrate how to apply the dispersive formalism to analyze the ultrafast nonlinear response in the context of the paradigmatic nonlinear Kerr effect. We find that the requirement of causality introduces a noticeable effect even under assumption that Kerr effect is mediated by quasi-instantaneous off-resonant electronic hyperpolarizability. We confirm this by experimentally measuring the time-resolved Kerr dynamics in GaAs by means of a hybrid pump-probe Mach-Zehnder interferometer and demonstrate the presence of an intrinsic lagging between amplitude and phase responses as predicted by dispersive analysis. Our results describe a general property of the time-resolved nonlinear processes thereby highlighting the importance of accounting for dispersive effects in the nonlinear optical processes involving ultrashort pulses.","lang":"eng"}],"date_updated":"2024-01-31T12:01:16Z","_id":"14886","year":"2024","acknowledgement":"The work was supported by the Institute of Science and Technology Austria (ISTA). We thank Prof. John M. Dudley, Dr. Ugur Sezer, and Dr. Artem Volosniev for valuable discussions.","ddc":["530"],"date_published":"2024-01-11T00:00:00Z","has_accepted_license":"1","publication_status":"published","oa":1,"citation":{"mla":"Lorenc, Dusan, and Zhanybek Alpichshev. “Dispersive Effects in Ultrafast Nonlinear Phenomena: The Case of Optical Kerr Effect.” <i>Physical Review Research</i>, vol. 6, no. 1, 013042, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevResearch.6.013042\">10.1103/PhysRevResearch.6.013042</a>.","ista":"Lorenc D, Alpichshev Z. 2024. Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect. Physical Review Research. 6(1), 013042.","apa":"Lorenc, D., &#38; Alpichshev, Z. (2024). Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect. <i>Physical Review Research</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevResearch.6.013042\">https://doi.org/10.1103/PhysRevResearch.6.013042</a>","ama":"Lorenc D, Alpichshev Z. Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect. <i>Physical Review Research</i>. 2024;6(1). doi:<a href=\"https://doi.org/10.1103/PhysRevResearch.6.013042\">10.1103/PhysRevResearch.6.013042</a>","short":"D. Lorenc, Z. Alpichshev, Physical Review Research 6 (2024).","ieee":"D. Lorenc and Z. Alpichshev, “Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect,” <i>Physical Review Research</i>, vol. 6, no. 1. American Physical Society, 2024.","chicago":"Lorenc, Dusan, and Zhanybek Alpichshev. “Dispersive Effects in Ultrafast Nonlinear Phenomena: The Case of Optical Kerr Effect.” <i>Physical Review Research</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevResearch.6.013042\">https://doi.org/10.1103/PhysRevResearch.6.013042</a>."},"intvolume":"         6","status":"public","article_number":"013042","title":"Dispersive effects in ultrafast nonlinear phenomena: The case of optical Kerr effect","day":"11","license":"https://creativecommons.org/licenses/by/4.0/","file":[{"creator":"dernst","file_size":2863627,"content_type":"application/pdf","relation":"main_file","file_name":"2024_PhysicalReviewResearch_Lorenc.pdf","success":1,"access_level":"open_access","date_created":"2024-01-31T11:59:30Z","checksum":"42d58f93ae74e7f2c4de058ef75ff8b2","file_id":"14918","date_updated":"2024-01-31T11:59:30Z"}],"author":[{"full_name":"Lorenc, Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87","first_name":"Dusan","last_name":"Lorenc"},{"full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","last_name":"Alpichshev","first_name":"Zhanybek"}],"article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"scopus_import":"1","article_processing_charge":"Yes","publication":"Physical Review Research","department":[{"_id":"ZhAl"}],"publisher":"American Physical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","quality_controlled":"1","doi":"10.1103/PhysRevResearch.6.013042","publication_identifier":{"eissn":["2643-1564"]},"issue":"1","language":[{"iso":"eng"}]},{"external_id":{"arxiv":["2306.09043"]},"status":"public","intvolume":"       123","citation":{"apa":"Lorenc, D., &#38; Alpichshev, Z. (2023). Mid-infrared Kerr index evaluation via cross-phase modulation with a near-infrared probe beam. <i>Applied Physics Letters</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0161713\">https://doi.org/10.1063/5.0161713</a>","ista":"Lorenc D, Alpichshev Z. 2023. Mid-infrared Kerr index evaluation via cross-phase modulation with a near-infrared probe beam. Applied Physics Letters. 123(9), 091104.","mla":"Lorenc, Dusan, and Zhanybek Alpichshev. “Mid-Infrared Kerr Index Evaluation via Cross-Phase Modulation with a near-Infrared Probe Beam.” <i>Applied Physics Letters</i>, vol. 123, no. 9, 091104, AIP Publishing, 2023, doi:<a href=\"https://doi.org/10.1063/5.0161713\">10.1063/5.0161713</a>.","ama":"Lorenc D, Alpichshev Z. Mid-infrared Kerr index evaluation via cross-phase modulation with a near-infrared probe beam. <i>Applied Physics Letters</i>. 2023;123(9). doi:<a href=\"https://doi.org/10.1063/5.0161713\">10.1063/5.0161713</a>","short":"D. Lorenc, Z. Alpichshev, Applied Physics Letters 123 (2023).","chicago":"Lorenc, Dusan, and Zhanybek Alpichshev. “Mid-Infrared Kerr Index Evaluation via Cross-Phase Modulation with a near-Infrared Probe Beam.” <i>Applied Physics Letters</i>. AIP Publishing, 2023. <a href=\"https://doi.org/10.1063/5.0161713\">https://doi.org/10.1063/5.0161713</a>.","ieee":"D. Lorenc and Z. Alpichshev, “Mid-infrared Kerr index evaluation via cross-phase modulation with a near-infrared probe beam,” <i>Applied Physics Letters</i>, vol. 123, no. 9. AIP Publishing, 2023."},"oa":1,"publication_status":"published","has_accepted_license":"1","date_published":"2023-08-28T00:00:00Z","ddc":["530"],"acknowledgement":"The work was supported by IST Austria. The authors would like to gratefully acknowledge the help and assistance of Professor John M. Dudley.","year":"2023","_id":"14342","date_updated":"2023-09-20T11:50:06Z","abstract":[{"text":"We propose a simple method to measure nonlinear Kerr refractive index in mid-infrared frequency range that avoids using sophisticated infrared detectors. Our approach is based on using a near-infrared probe beam which interacts with a mid-IR beam via wavelength-non-degenerate cross-phase modulation (XPM). By carefully measuring XPM-induced spectral modifications in the probe beam and comparing the experimental data with simulation results, we extract the value for the non-degenerate Kerr index. Finally, in order to obtain the value of degenerate mid-IR Kerr index, we use the well-established two-band formalism of Sheik-Bahae et al., which is shown to become particularly simple in the limit of low frequencies. The proposed technique is complementary to the conventional techniques, such as z-scan, and has the advantage of not requiring any mid-infrared detectors.","lang":"eng"}],"month":"08","type":"journal_article","oa_version":"Published Version","volume":123,"date_created":"2023-09-17T22:01:09Z","file_date_updated":"2023-09-20T11:36:16Z","language":[{"iso":"eng"}],"issue":"9","publication_identifier":{"issn":["0003-6951"]},"doi":"10.1063/5.0161713","quality_controlled":"1","publisher":"AIP Publishing","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","department":[{"_id":"ZhAl"}],"publication":"Applied Physics Letters","scopus_import":"1","article_processing_charge":"Yes (in subscription journal)","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"article_type":"original","author":[{"full_name":"Lorenc, Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87","last_name":"Lorenc","first_name":"Dusan"},{"full_name":"Alpichshev, Zhanybek","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203","last_name":"Alpichshev","first_name":"Zhanybek"}],"day":"28","file":[{"file_size":1486715,"relation":"main_file","content_type":"application/pdf","creator":"dernst","file_name":"2023_ApplPhysLetter_Lorenc.pdf","success":1,"date_created":"2023-09-20T11:36:16Z","access_level":"open_access","file_id":"14353","date_updated":"2023-09-20T11:36:16Z","checksum":"89a1b604d58b209fec66c6b6f919ac98"}],"arxiv":1,"title":"Mid-infrared Kerr index evaluation via cross-phase modulation with a near-infrared probe beam","article_number":"091104"},{"article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"article_processing_charge":"Yes (via OA deal)","ec_funded":1,"publication":"The Journal of Physical Chemistry Letters","department":[{"_id":"MiLe"},{"_id":"ZhAl"}],"publisher":"American Chemical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites","arxiv":1,"day":"05","file":[{"creator":"dernst","relation":"main_file","content_type":"application/pdf","file_size":2121252,"success":1,"file_name":"2023_JourPhysChemistry_Wei.pdf","access_level":"open_access","date_created":"2023-07-19T06:55:39Z","checksum":"c0c040063f06a51b9c463adc504f1a23","date_updated":"2023-07-19T06:55:39Z","file_id":"13253"}],"author":[{"full_name":"Wei, Yujing","id":"0c5ff007-2600-11ee-b896-98bd8d663294","orcid":"0000-0001-8913-9719","last_name":"Wei","first_name":"Yujing"},{"last_name":"Volosniev","first_name":"Artem","full_name":"Volosniev, Artem","orcid":"0000-0003-0393-5525","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Dusan","last_name":"Lorenc","full_name":"Lorenc, Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Zhumekenov, Ayan A.","last_name":"Zhumekenov","first_name":"Ayan A."},{"full_name":"Bakr, Osman M.","last_name":"Bakr","first_name":"Osman M."},{"orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","full_name":"Lemeshko, Mikhail","first_name":"Mikhail","last_name":"Lemeshko"},{"first_name":"Zhanybek","last_name":"Alpichshev","full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"}],"issue":"27","language":[{"iso":"eng"}],"keyword":["General Materials Science","Physical and Theoretical Chemistry"],"isi":1,"project":[{"_id":"2688CF98-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Angulon: physics and applications of a new quasiparticle","grant_number":"801770"}],"quality_controlled":"1","doi":"10.1021/acs.jpclett.3c01158","publication_identifier":{"eissn":["1948-7185"]},"_id":"13251","year":"2023","acknowledgement":"We thank Bingqing Cheng and Hong-Zhou Ye for valuable discussions; Y.W.’s work at IST Austria was supported through ISTernship summer internship program funded by OeADGmbH; D.L. and Z.A. acknowledge support by IST Austria (ISTA); M.L. acknowledges support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON).\r\nA.A.Z. and O.M.B. acknowledge support by KAUST.","date_created":"2023-07-18T11:13:17Z","file_date_updated":"2023-07-19T06:55:39Z","volume":14,"month":"07","type":"journal_article","oa_version":"Published Version","abstract":[{"text":"A rotating organic cation and a dynamically disordered soft inorganic cage are the hallmark features of organic-inorganic lead-halide perovskites. Understanding the interplay between these two subsystems is a challenging problem, but it is this coupling that is widely conjectured to be responsible for the unique behavior of photocarriers in these materials. In this work, we use the fact that the polarizability of the organic cation strongly depends on the ambient electrostatic environment to put the molecule forward as a sensitive probe of the local crystal fields inside the lattice cell. We measure the average polarizability of the C/N–H bond stretching mode by means of infrared spectroscopy, which allows us to deduce the character of the motion of the cation molecule, find the magnitude of the local crystal field, and place an estimate on the strength of the hydrogen bond between the hydrogen and halide atoms. Our results pave the way for understanding electric fields in lead-halide perovskites using infrared bond spectroscopy.","lang":"eng"}],"date_updated":"2023-07-19T06:59:19Z","page":"6309-6314","citation":{"apa":"Wei, Y., Volosniev, A., Lorenc, D., Zhumekenov, A. A., Bakr, O. M., Lemeshko, M., &#38; Alpichshev, Z. (2023). Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. <i>The Journal of Physical Chemistry Letters</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.jpclett.3c01158\">https://doi.org/10.1021/acs.jpclett.3c01158</a>","mla":"Wei, Yujing, et al. “Bond Polarizability as a Probe of Local Crystal Fields in Hybrid Lead-Halide Perovskites.” <i>The Journal of Physical Chemistry Letters</i>, vol. 14, no. 27, American Chemical Society, 2023, pp. 6309–14, doi:<a href=\"https://doi.org/10.1021/acs.jpclett.3c01158\">10.1021/acs.jpclett.3c01158</a>.","ista":"Wei Y, Volosniev A, Lorenc D, Zhumekenov AA, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. The Journal of Physical Chemistry Letters. 14(27), 6309–6314.","ama":"Wei Y, Volosniev A, Lorenc D, et al. Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. <i>The Journal of Physical Chemistry Letters</i>. 2023;14(27):6309-6314. doi:<a href=\"https://doi.org/10.1021/acs.jpclett.3c01158\">10.1021/acs.jpclett.3c01158</a>","short":"Y. Wei, A. Volosniev, D. Lorenc, A.A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, The Journal of Physical Chemistry Letters 14 (2023) 6309–6314.","chicago":"Wei, Yujing, Artem Volosniev, Dusan Lorenc, Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Bond Polarizability as a Probe of Local Crystal Fields in Hybrid Lead-Halide Perovskites.” <i>The Journal of Physical Chemistry Letters</i>. American Chemical Society, 2023. <a href=\"https://doi.org/10.1021/acs.jpclett.3c01158\">https://doi.org/10.1021/acs.jpclett.3c01158</a>.","ieee":"Y. Wei <i>et al.</i>, “Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites,” <i>The Journal of Physical Chemistry Letters</i>, vol. 14, no. 27. American Chemical Society, pp. 6309–6314, 2023."},"intvolume":"        14","external_id":{"arxiv":["2304.14198"],"isi":["001022811500001"]},"status":"public","ddc":["530"],"date_published":"2023-07-05T00:00:00Z","has_accepted_license":"1","publication_status":"published","oa":1},{"year":"2023","_id":"12723","oa_version":"Preprint","type":"journal_article","month":"03","date_updated":"2023-08-01T13:39:04Z","abstract":[{"lang":"eng","text":"Lead halide perovskites enjoy a number of remarkable optoelectronic properties. To explain their origin, it is necessary to study how electromagnetic fields interact with these systems. We address this problem here by studying two classical quantities: Faraday rotation and the complex refractive index in a paradigmatic perovskite CH3NH3PbBr3 in a broad wavelength range. We find that the minimal coupling of electromagnetic fields to the k⋅p Hamiltonian is insufficient to describe the observed data even on the qualitative level. To amend this, we demonstrate that there exists a relevant atomic-level coupling between electromagnetic fields and the spin degree of freedom. This spin-electric coupling allows for quantitative description of a number of previous as well as present experimental data. In particular, we use it here to show that the Faraday effect in lead halide perovskites is dominated by the Zeeman splitting of the energy levels and has a substantial beyond-Becquerel contribution. Finally, we present general symmetry-based phenomenological arguments that in the low-energy limit our effective model includes all basis coupling terms to the electromagnetic field in the linear order."}],"date_created":"2023-03-14T13:11:59Z","volume":130,"status":"public","external_id":{"arxiv":["2203.09443"],"isi":["000982435900002"]},"citation":{"ama":"Volosniev A, Shiva Kumar A, Lorenc D, et al. Spin-electric coupling in lead halide perovskites. <i>Physical Review Letters</i>. 2023;130(10). doi:<a href=\"https://doi.org/10.1103/physrevlett.130.106901\">10.1103/physrevlett.130.106901</a>","ista":"Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov AA, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Spin-electric coupling in lead halide perovskites. Physical Review Letters. 130(10), 106901.","mla":"Volosniev, Artem, et al. “Spin-Electric Coupling in Lead Halide Perovskites.” <i>Physical Review Letters</i>, vol. 130, no. 10, 106901, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevlett.130.106901\">10.1103/physrevlett.130.106901</a>.","apa":"Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov, A. A., Bakr, O. M., … Alpichshev, Z. (2023). Spin-electric coupling in lead halide perovskites. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevlett.130.106901\">https://doi.org/10.1103/physrevlett.130.106901</a>","ieee":"A. Volosniev <i>et al.</i>, “Spin-electric coupling in lead halide perovskites,” <i>Physical Review Letters</i>, vol. 130, no. 10. American Physical Society, 2023.","chicago":"Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri, Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Spin-Electric Coupling in Lead Halide Perovskites.” <i>Physical Review Letters</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevlett.130.106901\">https://doi.org/10.1103/physrevlett.130.106901</a>.","short":"A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A.A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review Letters 130 (2023)."},"intvolume":"       130","publication_status":"published","oa":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2203.09443"}],"date_published":"2023-03-10T00:00:00Z","department":[{"_id":"GradSch"},{"_id":"ZhAl"},{"_id":"MiLe"}],"publisher":"American Physical Society","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","article_type":"original","scopus_import":"1","article_processing_charge":"No","publication":"Physical Review Letters","day":"10","author":[{"full_name":"Volosniev, Artem","orcid":"0000-0003-0393-5525","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","first_name":"Artem","last_name":"Volosniev"},{"first_name":"Abhishek","last_name":"Shiva Kumar","id":"5e9a6931-eb97-11eb-a6c2-e96f7058d77a","full_name":"Shiva Kumar, Abhishek"},{"full_name":"Lorenc, Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87","last_name":"Lorenc","first_name":"Dusan"},{"full_name":"Ashourishokri, Younes","id":"e32c111f-f6e0-11ea-865d-eb955baea334","last_name":"Ashourishokri","first_name":"Younes"},{"full_name":"Zhumekenov, Ayan A.","first_name":"Ayan A.","last_name":"Zhumekenov"},{"full_name":"Bakr, Osman M.","first_name":"Osman M.","last_name":"Bakr"},{"last_name":"Lemeshko","first_name":"Mikhail","full_name":"Lemeshko, Mikhail","orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","last_name":"Alpichshev","first_name":"Zhanybek"}],"article_number":"106901","arxiv":1,"title":"Spin-electric coupling in lead halide perovskites","issue":"10","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy"],"isi":1,"publication_identifier":{"eissn":["1079-7114"],"issn":["0031-9007"]},"quality_controlled":"1","doi":"10.1103/physrevlett.130.106901"},{"oa":1,"publication_status":"published","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2204.04022","open_access":"1"}],"date_published":"2023-03-15T00:00:00Z","status":"public","external_id":{"arxiv":["2204.04022"],"isi":["000972602200006"]},"citation":{"ama":"Volosniev A, Shiva Kumar A, Lorenc D, et al. Effective model for studying optical properties of lead halide perovskites. <i>Physical Review B</i>. 2023;107(12). doi:<a href=\"https://doi.org/10.1103/physrevb.107.125201\">10.1103/physrevb.107.125201</a>","mla":"Volosniev, Artem, et al. “Effective Model for Studying Optical Properties of Lead Halide Perovskites.” <i>Physical Review B</i>, vol. 107, no. 12, 125201, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevb.107.125201\">10.1103/physrevb.107.125201</a>.","ista":"Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov A, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Effective model for studying optical properties of lead halide perovskites. Physical Review B. 107(12), 125201.","apa":"Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov, A., Bakr, O. M., … Alpichshev, Z. (2023). Effective model for studying optical properties of lead halide perovskites. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevb.107.125201\">https://doi.org/10.1103/physrevb.107.125201</a>","ieee":"A. Volosniev <i>et al.</i>, “Effective model for studying optical properties of lead halide perovskites,” <i>Physical Review B</i>, vol. 107, no. 12. American Physical Society, 2023.","chicago":"Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri, Ayan Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Effective Model for Studying Optical Properties of Lead Halide Perovskites.” <i>Physical Review B</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevb.107.125201\">https://doi.org/10.1103/physrevb.107.125201</a>.","short":"A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review B 107 (2023)."},"intvolume":"       107","date_updated":"2023-08-01T13:39:47Z","abstract":[{"lang":"eng","text":"We use general symmetry-based arguments to construct an effective model suitable for studying optical properties of lead halide perovskites. To build the model, we identify an atomic-level interaction between electromagnetic fields and the spin degree of freedom that should be added to a minimally coupled k⋅p Hamiltonian. As a first application, we study two basic optical characteristics of the material: the Verdet constant and the refractive index. Beyond these linear characteristics of the material, the model is suitable for calculating nonlinear effects such as the third-order optical susceptibility. Analysis of this quantity shows that the geometrical properties of the spin-electric term imply isotropic optical response of the system, and that optical anisotropy of lead halide perovskites is a manifestation of hopping of charge carriers. To illustrate this, we discuss third-harmonic generation."}],"oa_version":"Preprint","type":"journal_article","month":"03","date_created":"2023-03-14T13:13:05Z","volume":107,"year":"2023","_id":"12724","publication_identifier":{"eissn":["2469-9969"],"issn":["2469-9950"]},"quality_controlled":"1","doi":"10.1103/physrevb.107.125201","language":[{"iso":"eng"}],"issue":"12","isi":1,"day":"15","author":[{"last_name":"Volosniev","first_name":"Artem","full_name":"Volosniev, Artem","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-0393-5525"},{"last_name":"Shiva Kumar","first_name":"Abhishek","full_name":"Shiva Kumar, Abhishek","id":"5e9a6931-eb97-11eb-a6c2-e96f7058d77a"},{"full_name":"Lorenc, Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87","first_name":"Dusan","last_name":"Lorenc"},{"full_name":"Ashourishokri, Younes","id":"e32c111f-f6e0-11ea-865d-eb955baea334","first_name":"Younes","last_name":"Ashourishokri"},{"full_name":"Zhumekenov, Ayan","last_name":"Zhumekenov","first_name":"Ayan"},{"last_name":"Bakr","first_name":"Osman M.","full_name":"Bakr, Osman M."},{"orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","full_name":"Lemeshko, Mikhail","first_name":"Mikhail","last_name":"Lemeshko"},{"id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203","full_name":"Alpichshev, Zhanybek","first_name":"Zhanybek","last_name":"Alpichshev"}],"arxiv":1,"title":"Effective model for studying optical properties of lead halide perovskites","article_number":"125201","department":[{"_id":"GradSch"},{"_id":"ZhAl"},{"_id":"MiLe"}],"publisher":"American Physical Society","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","article_processing_charge":"No","scopus_import":"1","article_type":"original","publication":"Physical Review B"},{"ddc":["530"],"date_published":"2022-07-15T00:00:00Z","has_accepted_license":"1","oa":1,"publication_status":"published","citation":{"short":"U. Dziom, A. Shuvaev, J. Gospodarič, E.G. Novik, A.A. Dobretsova, N.N. Mikhailov, Z.D. Kvon, Z. Alpichshev, A. Pimenov, Physical Review B 106 (2022).","chicago":"Dziom, Uladzislau, A. Shuvaev, J. Gospodarič, E. G. Novik, A. A. Dobretsova, N. N. Mikhailov, Z. D. Kvon, Zhanybek Alpichshev, and A. Pimenov. “Universal Transparency and Asymmetric Spin Splitting near the Dirac Point in HgTe Quantum Wells.” <i>Physical Review B</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevB.106.045302\">https://doi.org/10.1103/PhysRevB.106.045302</a>.","ieee":"U. Dziom <i>et al.</i>, “Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells,” <i>Physical Review B</i>, vol. 106, no. 4. American Physical Society, 2022.","apa":"Dziom, U., Shuvaev, A., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov, N. N., … Pimenov, A. (2022). Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevB.106.045302\">https://doi.org/10.1103/PhysRevB.106.045302</a>","mla":"Dziom, Uladzislau, et al. “Universal Transparency and Asymmetric Spin Splitting near the Dirac Point in HgTe Quantum Wells.” <i>Physical Review B</i>, vol. 106, no. 4, 045302, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevB.106.045302\">10.1103/PhysRevB.106.045302</a>.","ista":"Dziom U, Shuvaev A, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon ZD, Alpichshev Z, Pimenov A. 2022. Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells. Physical Review B. 106(4), 045302.","ama":"Dziom U, Shuvaev A, Gospodarič J, et al. Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells. <i>Physical Review B</i>. 2022;106(4). doi:<a href=\"https://doi.org/10.1103/PhysRevB.106.045302\">10.1103/PhysRevB.106.045302</a>"},"intvolume":"       106","external_id":{"isi":["000834349200010"]},"status":"public","file_date_updated":"2022-08-08T06:58:22Z","date_created":"2022-08-07T22:01:58Z","volume":106,"date_updated":"2023-08-03T12:38:57Z","abstract":[{"lang":"eng","text":"Spin-orbit coupling in thin HgTe quantum wells results in a relativistic-like electron band structure, making it a versatile solid state platform to observe and control nontrivial electrodynamic phenomena. Here we report an observation of universal terahertz (THz) transparency determined by fine-structure constant α≈1/137 in 6.5-nm-thick HgTe layer, close to the critical thickness separating phases with topologically different electronic band structure. Using THz spectroscopy in a magnetic field we obtain direct evidence of asymmetric spin splitting of the Dirac cone. This particle-hole asymmetry facilitates optical control of edge spin currents in the quantum wells."}],"oa_version":"Published Version","type":"journal_article","month":"07","_id":"11737","year":"2022","acknowledgement":"This work was supported by the Austrian Science Funds (W 1243, I 3456-N27, I 5539-N).","quality_controlled":"1","doi":"10.1103/PhysRevB.106.045302","publication_identifier":{"issn":["2469-9950"],"eissn":["2469-9969"]},"language":[{"iso":"eng"}],"issue":"4","isi":1,"title":"Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells","article_number":"045302","day":"15","file":[{"success":1,"file_name":"2022_PhysRevB_Dziom.pdf","creator":"dernst","content_type":"application/pdf","relation":"main_file","file_size":774455,"checksum":"115aff9e0cde2f806cb26953d7262791","date_updated":"2022-08-08T06:58:22Z","file_id":"11743","access_level":"open_access","date_created":"2022-08-08T06:58:22Z"}],"author":[{"last_name":"Dziom","first_name":"Uladzislau","full_name":"Dziom, Uladzislau","id":"6A9A37C2-8C5C-11E9-AE53-F2FDE5697425","orcid":"0000-0002-1648-0999"},{"first_name":"A.","last_name":"Shuvaev","full_name":"Shuvaev, A."},{"last_name":"Gospodarič","first_name":"J.","full_name":"Gospodarič, J."},{"last_name":"Novik","first_name":"E. G.","full_name":"Novik, E. G."},{"last_name":"Dobretsova","first_name":"A. A.","full_name":"Dobretsova, A. A."},{"full_name":"Mikhailov, N. N.","first_name":"N. N.","last_name":"Mikhailov"},{"full_name":"Kvon, Z. D.","first_name":"Z. D.","last_name":"Kvon"},{"orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","full_name":"Alpichshev, Zhanybek","first_name":"Zhanybek","last_name":"Alpichshev"},{"last_name":"Pimenov","first_name":"A.","full_name":"Pimenov, A."}],"article_processing_charge":"No","scopus_import":"1","article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"publication":"Physical Review B","department":[{"_id":"ZhAl"}],"publisher":"American Physical Society","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8"},{"date_published":"2018-01-10T00:00:00Z","main_file_link":[{"url":"https://arxiv.org/abs/1712.07925","open_access":"1"}],"oa":1,"publication_status":"published","intvolume":"        18","extern":"1","citation":{"ieee":"F. Mahmood, Z. Alpichshev, Y. Lee, J. Kong, and N. Gedik, “Observation of exciton-exciton interaction mediated valley Depolarization in Monolayer MoSe2,” <i>Nano Letters</i>, vol. 18, no. 1. American Chemical Society, pp. 223–228, 2018.","chicago":"Mahmood, Fahad, Zhanybek Alpichshev, Yi Lee, Jing Kong, and Nuh Gedik. “Observation of Exciton-Exciton Interaction Mediated Valley Depolarization in Monolayer MoSe2.” <i>Nano Letters</i>. American Chemical Society, 2018. <a href=\"https://doi.org/10.1021/acs.nanolett.7b03953\">https://doi.org/10.1021/acs.nanolett.7b03953</a>.","short":"F. Mahmood, Z. Alpichshev, Y. Lee, J. Kong, N. Gedik, Nano Letters 18 (2018) 223–228.","ama":"Mahmood F, Alpichshev Z, Lee Y, Kong J, Gedik N. Observation of exciton-exciton interaction mediated valley Depolarization in Monolayer MoSe2. <i>Nano Letters</i>. 2018;18(1):223-228. doi:<a href=\"https://doi.org/10.1021/acs.nanolett.7b03953\">10.1021/acs.nanolett.7b03953</a>","ista":"Mahmood F, Alpichshev Z, Lee Y, Kong J, Gedik N. 2018. Observation of exciton-exciton interaction mediated valley Depolarization in Monolayer MoSe2. Nano Letters. 18(1), 223–228.","mla":"Mahmood, Fahad, et al. “Observation of Exciton-Exciton Interaction Mediated Valley Depolarization in Monolayer MoSe2.” <i>Nano Letters</i>, vol. 18, no. 1, American Chemical Society, 2018, pp. 223–28, doi:<a href=\"https://doi.org/10.1021/acs.nanolett.7b03953\">10.1021/acs.nanolett.7b03953</a>.","apa":"Mahmood, F., Alpichshev, Z., Lee, Y., Kong, J., &#38; Gedik, N. (2018). Observation of exciton-exciton interaction mediated valley Depolarization in Monolayer MoSe2. <i>Nano Letters</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.nanolett.7b03953\">https://doi.org/10.1021/acs.nanolett.7b03953</a>"},"status":"public","external_id":{"arxiv":["1712.07925"]},"volume":18,"date_created":"2018-12-11T11:46:13Z","page":"223 - 228","date_updated":"2021-01-12T07:53:20Z","abstract":[{"text":"The valley pseudospin in monolayer transition metal dichalcogenides (TMDs) has been proposed as a new way to manipulate information in various optoelectronic devices. This relies on a large valley polarization that remains stable over long time scales (hundreds of nanoseconds). However, time-resolved measurements report valley lifetimes of only a few picoseconds. This has been attributed to mechanisms such as phonon-mediated intervalley scattering and a precession of the valley pseudospin through electron-hole exchange. Here we use transient spin grating to directly measure the valley depolarization lifetime in monolayer MoSe2. We find a fast valley decay rate that scales linearly with the excitation density at different temperatures. This establishes the presence of strong exciton-exciton Coulomb exchange interactions enhancing the valley depolarization. Our work highlights the microscopic processes inhibiting the efficient use of the exciton valley pseudospin in monolayer TMDs. ","lang":"eng"}],"oa_version":"Submitted Version","month":"01","type":"journal_article","_id":"394","year":"2018","doi":"10.1021/acs.nanolett.7b03953","quality_controlled":"1","language":[{"iso":"eng"}],"issue":"1","title":"Observation of exciton-exciton interaction mediated valley Depolarization in Monolayer MoSe2","arxiv":1,"publist_id":"7435","author":[{"first_name":"Fahad","last_name":"Mahmood","full_name":"Mahmood, Fahad"},{"orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","full_name":"Alpichshev, Zhanybek","first_name":"Zhanybek","last_name":"Alpichshev"},{"full_name":"Lee, Yi","last_name":"Lee","first_name":"Yi"},{"last_name":"Kong","first_name":"Jing","full_name":"Kong, Jing"},{"last_name":"Gedik","first_name":"Nuh","full_name":"Gedik, Nuh"}],"day":"10","publication":"Nano Letters","publisher":"American Chemical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87"},{"status":"public","citation":{"apa":"Xu, Y., Chiu, J., Miao, L., He, H., Alpichshev, Z., Kapitulnik, A., … Wray, L. (2017). Disorder enabled band structure engineering of a topological insulator surface. <i>Nature Communications</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/ncomms14081\">https://doi.org/10.1038/ncomms14081</a>","ista":"Xu Y, Chiu J, Miao L, He H, Alpichshev Z, Kapitulnik A, Biswas R, Wray L. 2017. Disorder enabled band structure engineering of a topological insulator surface. Nature Communications. 8.","mla":"Xu, Yishuai, et al. “Disorder Enabled Band Structure Engineering of a Topological Insulator Surface.” <i>Nature Communications</i>, vol. 8, Nature Publishing Group, 2017, doi:<a href=\"https://doi.org/10.1038/ncomms14081\">10.1038/ncomms14081</a>.","ama":"Xu Y, Chiu J, Miao L, et al. Disorder enabled band structure engineering of a topological insulator surface. <i>Nature Communications</i>. 2017;8. doi:<a href=\"https://doi.org/10.1038/ncomms14081\">10.1038/ncomms14081</a>","short":"Y. Xu, J. Chiu, L. Miao, H. He, Z. Alpichshev, A. Kapitulnik, R. Biswas, L. Wray, Nature Communications 8 (2017).","chicago":"Xu, Yishuai, Janet Chiu, Lin Miao, Haowei He, Zhanybek Alpichshev, Aharon Kapitulnik, Rudro Biswas, and Lewis Wray. “Disorder Enabled Band Structure Engineering of a Topological Insulator Surface.” <i>Nature Communications</i>. Nature Publishing Group, 2017. <a href=\"https://doi.org/10.1038/ncomms14081\">https://doi.org/10.1038/ncomms14081</a>.","ieee":"Y. Xu <i>et al.</i>, “Disorder enabled band structure engineering of a topological insulator surface,” <i>Nature Communications</i>, vol. 8. Nature Publishing Group, 2017."},"language":[{"iso":"eng"}],"intvolume":"         8","extern":"1","publication_status":"published","doi":"10.1038/ncomms14081","date_published":"2017-02-03T00:00:00Z","year":"2017","publisher":"Nature Publishing Group","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","_id":"391","publication":"Nature Communications","oa_version":"None","type":"journal_article","month":"02","day":"03","date_updated":"2021-01-12T07:53:08Z","abstract":[{"text":"Three-dimensional topological insulators are bulk insulators with Z 2 topological electronic order that gives rise to conducting light-like surface states. These surface electrons are exceptionally resistant to localization by non-magnetic disorder, and have been adopted as the basis for a wide range of proposals to achieve new quasiparticle species and device functionality. Recent studies have yielded a surprise by showing that in spite of resisting localization, topological insulator surface electrons can be reshaped by defects into distinctive resonance states. Here we use numerical simulations and scanning tunnelling microscopy data to show that these resonance states have significance well beyond the localized regime usually associated with impurity bands. At native densities in the model Bi2X3 (X=Bi, Te) compounds, defect resonance states are predicted to generate a new quantum basis for an emergent electron gas that supports diffusive electrical transport. ","lang":"eng"}],"author":[{"first_name":"Yishuai","last_name":"Xu","full_name":"Xu, Yishuai"},{"full_name":"Chiu, Janet","last_name":"Chiu","first_name":"Janet"},{"last_name":"Miao","first_name":"Lin","full_name":"Miao, Lin"},{"last_name":"He","first_name":"Haowei","full_name":"He, Haowei"},{"first_name":"Zhanybek","last_name":"Alpichshev","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","full_name":"Alpichshev, Zhanybek"},{"first_name":"Aharon","last_name":"Kapitulnik","full_name":"Kapitulnik, Aharon"},{"full_name":"Biswas, Rudro","last_name":"Biswas","first_name":"Rudro"},{"first_name":"Lewis","last_name":"Wray","full_name":"Wray, Lewis"}],"publist_id":"7438","date_created":"2018-12-11T11:46:12Z","volume":8,"title":"Disorder enabled band structure engineering of a topological insulator surface"},{"date_created":"2018-12-11T11:46:13Z","publist_id":"7437","volume":95,"title":"Ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate La2 xCexCuO4±δ","day":"13","date_updated":"2021-01-12T07:53:12Z","abstract":[{"text":"We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La2-xCexCuO4 (LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above Tc, we observe fluence-dependent relaxation rates that begin at a temperature similar to the one where transport measurements first show signatures of antiferromagnetic correlations. Upon suppressing superconductivity with a magnetic field, it is found that the fluence and temperature dependence of relaxation rates are consistent with bimolecular recombination of electrons and holes across a gap (2ΔAF) originating from antiferromagnetic correlations which comprise the pseudogap in electron-doped cuprates. This can be used to learn about coupling between electrons and high-energy (ω&gt;2ΔAF) excitations in these compounds and set limits on the time scales on which antiferromagnetic correlations are static.","lang":"eng"}],"type":"journal_article","oa_version":"None","month":"03","author":[{"first_name":"Inna","last_name":"Vishik","full_name":"Vishik, Inna"},{"full_name":"Mahmood, Fahad","last_name":"Mahmood","first_name":"Fahad"},{"last_name":"Alpichshev","first_name":"Zhanybek","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203","full_name":"Alpichshev, Zhanybek"},{"full_name":"Gedik, Nuh","first_name":"Nuh","last_name":"Gedik"},{"first_name":"Joshu","last_name":"Higgins","full_name":"Higgins, Joshu"},{"last_name":"Greene","first_name":"Richard","full_name":"Greene, Richard"}],"publication":"Physical Review B","_id":"392","year":"2017","publisher":"American Physical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","acknowledgement":"Optical pump-probe work was supported by the Gordon and Betty Moore Foundation's EPiQS initiative through Grant No. GBMF4540. Materials growth and characterization was supported by AFOSR FA95501410332 and NSF DMR1410665.","main_file_link":[{"url":"http://dspace.mit.edu/handle/1721.1/109835","open_access":"1"}],"date_published":"2017-03-13T00:00:00Z","doi":"10.1103/PhysRevB.95.115125","oa":1,"publication_status":"published","citation":{"ama":"Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. Ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate La2 xCexCuO4±δ. <i>Physical Review B</i>. 2017;95(11). doi:<a href=\"https://doi.org/10.1103/PhysRevB.95.115125\">10.1103/PhysRevB.95.115125</a>","ista":"Vishik I, Mahmood F, Alpichshev Z, Gedik N, Higgins J, Greene R. 2017. Ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate La2 xCexCuO4±δ. Physical Review B. 95(11).","mla":"Vishik, Inna, et al. “Ultrafast Dynamics in the Presence of Antiferromagnetic Correlations in Electron Doped Cuprate La2 XCexCuO4±δ.” <i>Physical Review B</i>, vol. 95, no. 11, American Physical Society, 2017, doi:<a href=\"https://doi.org/10.1103/PhysRevB.95.115125\">10.1103/PhysRevB.95.115125</a>.","apa":"Vishik, I., Mahmood, F., Alpichshev, Z., Gedik, N., Higgins, J., &#38; Greene, R. (2017). Ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate La2 xCexCuO4±δ. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevB.95.115125\">https://doi.org/10.1103/PhysRevB.95.115125</a>","ieee":"I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, and R. Greene, “Ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate La2 xCexCuO4±δ,” <i>Physical Review B</i>, vol. 95, no. 11. American Physical Society, 2017.","chicago":"Vishik, Inna, Fahad Mahmood, Zhanybek Alpichshev, Nuh Gedik, Joshu Higgins, and Richard Greene. “Ultrafast Dynamics in the Presence of Antiferromagnetic Correlations in Electron Doped Cuprate La2 XCexCuO4±δ.” <i>Physical Review B</i>. American Physical Society, 2017. <a href=\"https://doi.org/10.1103/PhysRevB.95.115125\">https://doi.org/10.1103/PhysRevB.95.115125</a>.","short":"I. Vishik, F. Mahmood, Z. Alpichshev, N. Gedik, J. Higgins, R. Greene, Physical Review B 95 (2017)."},"language":[{"iso":"eng"}],"issue":"11","extern":"1","intvolume":"        95","status":"public"},{"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"American Physical Society","acknowledgement":"Z.A. gratefully acknowledges discussions with P. A. Lee and A. Kemper. A conversation with J. Zaanen was instrumental in clarifying the physical picture described in this paper. We would also like to thank A. Kogar for thoroughly reading the manuscript and making valuable comments. This work was supported by Army Research Office Grant No. W911NF-15-1-0128 and Gordon and Betty Moore Foundation EPiQS Initiative through Grant No. GBMF4540 (time resolved optical spectroscopy), Skoltech, as part of the Skoltech NGP program (theory) and National Science Foundation Grant No. DMR-1265162 (material growth).\r\n\r\n","year":"2017","publication":"Physical Review B","_id":"393","author":[{"first_name":"Zhanybek","last_name":"Alpichshev","full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Sie","first_name":"Edbert","full_name":"Sie, Edbert"},{"last_name":"Mahmood","first_name":"Fahad","full_name":"Mahmood, Fahad"},{"first_name":"Gang","last_name":"Cao","full_name":"Cao, Gang"},{"last_name":"Gedik","first_name":"Nuh","full_name":"Gedik, Nuh"}],"date_updated":"2021-01-12T07:53:16Z","abstract":[{"lang":"eng","text":"We use a three-pulse ultrafast optical spectroscopy to study the relaxation processes in a frustrated Mott insulator Na2IrO3. By being able to independently produce the out-of-equilibrium bound states (excitons) of doublons and holons with the first pulse and suppress the underlying antiferromagnetic order with the second one, we were able to elucidate the relaxation mechanism of quasiparticles in this system. By observing the difference in the exciton dynamics in the magnetically ordered and disordered phases we found that the mass of this quasiparticle is mostly determined by its interaction with the surrounding spins. "}],"day":"26","oa_version":"None","type":"journal_article","month":"12","volume":96,"title":"Origin of the exciton mass in the frustrated Mott insulator Na2IrO3","date_created":"2018-12-11T11:46:13Z","publist_id":"7436","status":"public","extern":"1","intvolume":"        96","citation":{"chicago":"Alpichshev, Zhanybek, Edbert Sie, Fahad Mahmood, Gang Cao, and Nuh Gedik. “Origin of the Exciton Mass in the Frustrated Mott Insulator Na2IrO3.” <i>Physical Review B</i>. American Physical Society, 2017. <a href=\"https://doi.org/10.1103/PhysRevB.96.235141\">https://doi.org/10.1103/PhysRevB.96.235141</a>.","ieee":"Z. Alpichshev, E. Sie, F. Mahmood, G. Cao, and N. Gedik, “Origin of the exciton mass in the frustrated Mott insulator Na2IrO3,” <i>Physical Review B</i>, vol. 96, no. 23. American Physical Society, 2017.","short":"Z. Alpichshev, E. Sie, F. Mahmood, G. Cao, N. Gedik, Physical Review B 96 (2017).","ama":"Alpichshev Z, Sie E, Mahmood F, Cao G, Gedik N. Origin of the exciton mass in the frustrated Mott insulator Na2IrO3. <i>Physical Review B</i>. 2017;96(23). doi:<a href=\"https://doi.org/10.1103/PhysRevB.96.235141\">10.1103/PhysRevB.96.235141</a>","apa":"Alpichshev, Z., Sie, E., Mahmood, F., Cao, G., &#38; Gedik, N. (2017). Origin of the exciton mass in the frustrated Mott insulator Na2IrO3. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevB.96.235141\">https://doi.org/10.1103/PhysRevB.96.235141</a>","ista":"Alpichshev Z, Sie E, Mahmood F, Cao G, Gedik N. 2017. Origin of the exciton mass in the frustrated Mott insulator Na2IrO3. Physical Review B. 96(23).","mla":"Alpichshev, Zhanybek, et al. “Origin of the Exciton Mass in the Frustrated Mott Insulator Na2IrO3.” <i>Physical Review B</i>, vol. 96, no. 23, American Physical Society, 2017, doi:<a href=\"https://doi.org/10.1103/PhysRevB.96.235141\">10.1103/PhysRevB.96.235141</a>."},"language":[{"iso":"eng"}],"issue":"23","oa":1,"publication_status":"published","date_published":"2017-12-26T00:00:00Z","doi":"10.1103/PhysRevB.96.235141","main_file_link":[{"open_access":"1","url":"http://dspace.mit.edu/handle/1721.1/114259"}]},{"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1512.05714"}],"date_published":"2016-04-01T00:00:00Z","doi":"10.1038/nphys3609","publication_status":"published","oa":1,"language":[{"iso":"eng"}],"citation":{"ieee":"F. Mahmood <i>et al.</i>, “Selective scattering between Floquet Bloch and Volkov states in a topological insulator,” <i>Nature Physics</i>, vol. 12, no. 4. Nature Publishing Group, pp. 306–310, 2016.","chicago":"Mahmood, Fahad, Ching Chan, Zhanybek Alpichshev, Dillon Gardner, Young Lee, Patrick Lee, and Nuh Gedik. “Selective Scattering between Floquet Bloch and Volkov States in a Topological Insulator.” <i>Nature Physics</i>. Nature Publishing Group, 2016. <a href=\"https://doi.org/10.1038/nphys3609\">https://doi.org/10.1038/nphys3609</a>.","short":"F. Mahmood, C. Chan, Z. Alpichshev, D. Gardner, Y. Lee, P. Lee, N. Gedik, Nature Physics 12 (2016) 306–310.","ama":"Mahmood F, Chan C, Alpichshev Z, et al. Selective scattering between Floquet Bloch and Volkov states in a topological insulator. <i>Nature Physics</i>. 2016;12(4):306-310. doi:<a href=\"https://doi.org/10.1038/nphys3609\">10.1038/nphys3609</a>","mla":"Mahmood, Fahad, et al. “Selective Scattering between Floquet Bloch and Volkov States in a Topological Insulator.” <i>Nature Physics</i>, vol. 12, no. 4, Nature Publishing Group, 2016, pp. 306–10, doi:<a href=\"https://doi.org/10.1038/nphys3609\">10.1038/nphys3609</a>.","ista":"Mahmood F, Chan C, Alpichshev Z, Gardner D, Lee Y, Lee P, Gedik N. 2016. Selective scattering between Floquet Bloch and Volkov states in a topological insulator. Nature Physics. 12(4), 306–310.","apa":"Mahmood, F., Chan, C., Alpichshev, Z., Gardner, D., Lee, Y., Lee, P., &#38; Gedik, N. (2016). Selective scattering between Floquet Bloch and Volkov states in a topological insulator. <i>Nature Physics</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/nphys3609\">https://doi.org/10.1038/nphys3609</a>"},"issue":"4","intvolume":"        12","extern":"1","status":"public","date_created":"2018-12-11T11:46:11Z","publist_id":"7440","title":"Selective scattering between Floquet Bloch and Volkov states in a topological insulator","volume":12,"day":"01","abstract":[{"text":"The coherent optical manipulation of solids is emerging as a promising way to engineer novel quantum states of matter. The strong time-periodic potential of intense laser light can be used to generate hybrid photon-electron states. Interaction of light with Bloch states leads to Floquet-Bloch states, which are essential in realizing new photo-induced quantum phases. Similarly, dressing of free-electron states near the surface of a solid generates Volkov states, which are used to study nonlinear optics in atoms and semiconductors. The interaction of these two dynamic states with each other remains an open experimental problem. Here we use time- and angle-resolved photoemission spectroscopy (Tr-ARPES) to selectively study the transition between these two states on the surface of the topological insulator Bi2Se3. We find that the coupling between the two strongly depends on the electron momentum, providing a route to enhance or inhibit it. Moreover, by controlling the light polarization we can negate Volkov states to generate pure Floquet-Bloch states. This work establishes a systematic path for the coherent manipulation of solids via light-matter interaction.","lang":"eng"}],"date_updated":"2021-01-12T07:52:59Z","month":"04","type":"journal_article","oa_version":"None","page":"306 - 310","author":[{"first_name":"Fahad","last_name":"Mahmood","full_name":"Mahmood, Fahad"},{"full_name":"Chan, Ching","first_name":"Ching","last_name":"Chan"},{"first_name":"Zhanybek","last_name":"Alpichshev","full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Gardner","first_name":"Dillon","full_name":"Gardner, Dillon"},{"full_name":"Lee, Young","first_name":"Young","last_name":"Lee"},{"first_name":"Patrick","last_name":"Lee","full_name":"Lee, Patrick"},{"full_name":"Gedik, Nuh","last_name":"Gedik","first_name":"Nuh"}],"publication":"Nature Physics","_id":"389","year":"2016","publisher":"Nature Publishing Group","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","acknowledgement":"The authors would like to thank C. Lee for useful discussions. This work is supported by US Department of Energy (DOE), Basic Energy Sciences, Division of Materials Sciences and Engineering (experimental set-up, data acquisition and theory), Army Research Office (electron spectrometer) and by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4540 (data analysis)."},{"doi":"10.1038/srep23610","date_published":"2016-04-13T00:00:00Z","publication_status":"published","citation":{"short":"J. Hinton, E. Thewalt, Z. Alpichshev, F. Mahmood, J. Koralek, M. Chan, M. Veit, C. Dorow, N. Barišić, A. Kemper, D. Bonn, W. Hardy, R. Liang, N. Gedik, M. Greven, A. Lanzara, J. Orenstein, Scientific Reports 6 (2016).","ieee":"J. Hinton <i>et al.</i>, “The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors,” <i>Scientific Reports</i>, vol. 6. Nature Publishing Group, 2016.","chicago":"Hinton, James, E Thewalt, Zhanybek Alpichshev, Fahad Mahmood, Jake Koralek, Mun Chan, Michael Veit, et al. “The Rate of Quasiparticle Recombination Probes the Onset of Coherence in Cuprate Superconductors.” <i>Scientific Reports</i>. Nature Publishing Group, 2016. <a href=\"https://doi.org/10.1038/srep23610\">https://doi.org/10.1038/srep23610</a>.","mla":"Hinton, James, et al. “The Rate of Quasiparticle Recombination Probes the Onset of Coherence in Cuprate Superconductors.” <i>Scientific Reports</i>, vol. 6, Nature Publishing Group, 2016, doi:<a href=\"https://doi.org/10.1038/srep23610\">10.1038/srep23610</a>.","ista":"Hinton J, Thewalt E, Alpichshev Z, Mahmood F, Koralek J, Chan M, Veit M, Dorow C, Barišić N, Kemper A, Bonn D, Hardy W, Liang R, Gedik N, Greven M, Lanzara A, Orenstein J. 2016. The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors. Scientific Reports. 6.","apa":"Hinton, J., Thewalt, E., Alpichshev, Z., Mahmood, F., Koralek, J., Chan, M., … Orenstein, J. (2016). The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors. <i>Scientific Reports</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/srep23610\">https://doi.org/10.1038/srep23610</a>","ama":"Hinton J, Thewalt E, Alpichshev Z, et al. The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors. <i>Scientific Reports</i>. 2016;6. doi:<a href=\"https://doi.org/10.1038/srep23610\">10.1038/srep23610</a>"},"language":[{"iso":"eng"}],"intvolume":"         6","extern":"1","status":"public","publist_id":"7439","date_created":"2018-12-11T11:46:12Z","volume":6,"title":"The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors","type":"journal_article","oa_version":"None","month":"04","day":"13","abstract":[{"text":"In the underdoped copper-oxides, high-temperature superconductivity condenses from a nonconventional metallic &quot;pseudogap&quot; phase that exhibits a variety of non-Fermi liquid properties. Recently, it has become clear that a charge density wave (CDW) phase exists within the pseudogap regime. This CDW coexists and competes with superconductivity (SC) below the transition temperature Tc, suggesting that these two orders are intimately related. Here we show that the condensation of the superfluid from this unconventional precursor is reflected in deviations from the predictions of BSC theory regarding the recombination rate of quasiparticles. We report a detailed investigation of the quasiparticle (QP) recombination lifetime, τqp, as a function of temperature and magnetic field in underdoped HgBa2CuO4+δ (Hg-1201) and YBa2Cu3O6+x (YBCO) single crystals by ultrafast time-resolved reflectivity. We find that τqp (T) exhibits a local maximum in a small temperature window near Tc that is prominent in underdoped samples with coexisting charge order and vanishes with application of a small magnetic field. We explain this unusual, non-BCS behavior by positing that Tc marks a transition from phase-fluctuating SC/CDW composite order above to a SC/CDW condensate below. Our results suggest that the superfluid in underdoped cuprates is a condensate of coherently-mixed particle-particle and particle-hole pairs.","lang":"eng"}],"date_updated":"2021-01-12T07:53:03Z","author":[{"last_name":"Hinton","first_name":"James","full_name":"Hinton, James"},{"full_name":"Thewalt, E","last_name":"Thewalt","first_name":"E"},{"last_name":"Alpichshev","first_name":"Zhanybek","full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Mahmood, Fahad","last_name":"Mahmood","first_name":"Fahad"},{"full_name":"Koralek, Jake","first_name":"Jake","last_name":"Koralek"},{"first_name":"Mun","last_name":"Chan","full_name":"Chan, Mun"},{"full_name":"Veit, Michael","last_name":"Veit","first_name":"Michael"},{"full_name":"Dorow, Chelsey","last_name":"Dorow","first_name":"Chelsey"},{"last_name":"Barišić","first_name":"Neven","full_name":"Barišić, Neven"},{"first_name":"Alexander","last_name":"Kemper","full_name":"Kemper, Alexander"},{"full_name":"Bonn, Doug","last_name":"Bonn","first_name":"Doug"},{"full_name":"Hardy, Walter","last_name":"Hardy","first_name":"Walter"},{"full_name":"Liang, Ruixing","last_name":"Liang","first_name":"Ruixing"},{"last_name":"Gedik","first_name":"Nuh","full_name":"Gedik, Nuh"},{"full_name":"Greven, Martin","last_name":"Greven","first_name":"Martin"},{"last_name":"Lanzara","first_name":"Alessandra","full_name":"Lanzara, Alessandra"},{"last_name":"Orenstein","first_name":"Joseph","full_name":"Orenstein, Joseph"}],"_id":"390","publication":"Scientific Reports","year":"2016","publisher":"Nature Publishing Group","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87"},{"status":"public","citation":{"ama":"Alpichshev Z, Mahmood F, Cao G, Gedik N. Confinement deconfinement transition as an indication of spin liquid type behavior in Na2IrO3. <i>Physical Review Letters</i>. 2015;114(1). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.114.017203\">10.1103/PhysRevLett.114.017203</a>","ista":"Alpichshev Z, Mahmood F, Cao G, Gedik N. 2015. Confinement deconfinement transition as an indication of spin liquid type behavior in Na2IrO3. Physical Review Letters. 114(1).","mla":"Alpichshev, Zhanybek, et al. “Confinement Deconfinement Transition as an Indication of Spin Liquid Type Behavior in Na2IrO3.” <i>Physical Review Letters</i>, vol. 114, no. 1, American Physical Society, 2015, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.114.017203\">10.1103/PhysRevLett.114.017203</a>.","apa":"Alpichshev, Z., Mahmood, F., Cao, G., &#38; Gedik, N. (2015). Confinement deconfinement transition as an indication of spin liquid type behavior in Na2IrO3. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.114.017203\">https://doi.org/10.1103/PhysRevLett.114.017203</a>","ieee":"Z. Alpichshev, F. Mahmood, G. Cao, and N. Gedik, “Confinement deconfinement transition as an indication of spin liquid type behavior in Na2IrO3,” <i>Physical Review Letters</i>, vol. 114, no. 1. American Physical Society, 2015.","chicago":"Alpichshev, Zhanybek, Fahad Mahmood, Gang Cao, and Nuh Gedik. “Confinement Deconfinement Transition as an Indication of Spin Liquid Type Behavior in Na2IrO3.” <i>Physical Review Letters</i>. American Physical Society, 2015. <a href=\"https://doi.org/10.1103/PhysRevLett.114.017203\">https://doi.org/10.1103/PhysRevLett.114.017203</a>.","short":"Z. Alpichshev, F. Mahmood, G. Cao, N. Gedik, Physical Review Letters 114 (2015)."},"language":[{"iso":"eng"}],"issue":"1","intvolume":"       114","extern":"1","oa":1,"publication_status":"published","main_file_link":[{"open_access":"1","url":"https://dspace.mit.edu/handle/1721.1/92979"}],"quality_controlled":"1","doi":"10.1103/PhysRevLett.114.017203","date_published":"2015-07-07T00:00:00Z","year":"2015","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"American Physical Society","article_processing_charge":"No","article_type":"original","publication":"Physical Review Letters","_id":"388","abstract":[{"lang":"eng","text":"We use ultrafast optical spectroscopy to observe binding of charged single-particle excitations (SE) in the magnetically frustrated Mott insulator Na2IrO3. Above the antiferromagnetic ordering temperature (TN) the system response is due to both Hubbard excitons (HE) and their constituent unpaired SE. The SE response becomes strongly suppressed immediately below TN. We argue that this increase in binding energy is due to a unique interplay between the frustrated Kitaev and the weak Heisenberg-type ordering term in the Hamiltonian, mediating an effective interaction between the spin-singlet SE. This interaction grows with distance causing the SE to become trapped in the HE, similar to quark confinement inside hadrons. This binding of charged particles, induced by magnetic ordering, is a result of a confinement-deconfinement transition of spin excitations. This observation provides evidence for spin liquid type behavior which is expected in Na2IrO3."}],"date_updated":"2021-01-12T07:52:54Z","day":"07","oa_version":"Published Version","type":"journal_article","month":"07","author":[{"first_name":"Zhanybek","last_name":"Alpichshev","full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Mahmood, Fahad","first_name":"Fahad","last_name":"Mahmood"},{"full_name":"Cao, Gang","first_name":"Gang","last_name":"Cao"},{"full_name":"Gedik, Nuh","last_name":"Gedik","first_name":"Nuh"}],"date_created":"2018-12-11T11:46:11Z","publist_id":"7441","title":"Confinement deconfinement transition as an indication of spin liquid type behavior in Na2IrO3","volume":114},{"issue":"20","language":[{"iso":"eng"}],"citation":{"ama":"Alpichshev Z, Biswas R, Balatsky A, et al. STM imaging of impurity resonances on Bi 2Se 3. <i>Physical Review Letters</i>. 2012;108(20). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.108.206402\">10.1103/PhysRevLett.108.206402</a>","apa":"Alpichshev, Z., Biswas, R., Balatsky, A., Analytis, J., Chu, J., Fisher, I., &#38; Kapitulnik, A. (2012). STM imaging of impurity resonances on Bi 2Se 3. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.108.206402\">https://doi.org/10.1103/PhysRevLett.108.206402</a>","ista":"Alpichshev Z, Biswas R, Balatsky A, Analytis J, Chu J, Fisher I, Kapitulnik A. 2012. STM imaging of impurity resonances on Bi 2Se 3. Physical Review Letters. 108(20).","mla":"Alpichshev, Zhanybek, et al. “STM Imaging of Impurity Resonances on Bi 2Se 3.” <i>Physical Review Letters</i>, vol. 108, no. 20, American Physical Society, 2012, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.108.206402\">10.1103/PhysRevLett.108.206402</a>.","chicago":"Alpichshev, Zhanybek, Rudro Biswas, Alexander Balatsky, James Analytis, Jiunhaw Chu, Ian Fisher, and Aharon Kapitulnik. “STM Imaging of Impurity Resonances on Bi 2Se 3.” <i>Physical Review Letters</i>. American Physical Society, 2012. <a href=\"https://doi.org/10.1103/PhysRevLett.108.206402\">https://doi.org/10.1103/PhysRevLett.108.206402</a>.","ieee":"Z. Alpichshev <i>et al.</i>, “STM imaging of impurity resonances on Bi 2Se 3,” <i>Physical Review Letters</i>, vol. 108, no. 20. American Physical Society, 2012.","short":"Z. Alpichshev, R. Biswas, A. Balatsky, J. Analytis, J. Chu, I. Fisher, A. Kapitulnik, Physical Review Letters 108 (2012)."},"intvolume":"       108","extern":"1","status":"public","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1108.0022"}],"doi":"10.1103/PhysRevLett.108.206402","date_published":"2012-01-01T00:00:00Z","oa":1,"publication_status":"published","_id":"387","publication":"Physical Review Letters","year":"2012","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"American Physical Society","publist_id":"7442","date_created":"2018-12-11T11:46:11Z","volume":108,"title":"STM imaging of impurity resonances on Bi 2Se 3","month":"01","oa_version":"None","type":"journal_article","day":"01","date_updated":"2021-01-12T07:52:49Z","abstract":[{"lang":"eng","text":"In this Letter we present detailed study of the density of states near defects in Bi 2Se 3. In particular, we present data on the commonly found triangular defects in this system. While we do not find any measurable quasiparticle scattering interference effects, we do find localized resonances, which can be well fitted by theory once the potential is taken to be extended to properly account for the observed defects. The data together with the fits confirm that while the local density of states around the Dirac point of the electronic spectrum at the surface is significantly disrupted near the impurity by the creation of low-energy resonance state, the Dirac point is not locally destroyed. We discuss our results in terms of the expected protected surface state of topological insulators. © 2012 American Physical Society."}],"author":[{"id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203","full_name":"Alpichshev, Zhanybek","last_name":"Alpichshev","first_name":"Zhanybek"},{"full_name":"Biswas, Rudro","first_name":"Rudro","last_name":"Biswas"},{"full_name":"Balatsky, Alexander","first_name":"Alexander","last_name":"Balatsky"},{"full_name":"Analytis, James","last_name":"Analytis","first_name":"James"},{"first_name":"Jiunhaw","last_name":"Chu","full_name":"Chu, Jiunhaw"},{"last_name":"Fisher","first_name":"Ian","full_name":"Fisher, Ian"},{"last_name":"Kapitulnik","first_name":"Aharon","full_name":"Kapitulnik, Aharon"}]},{"date_created":"2018-12-11T11:46:10Z","volume":84,"date_updated":"2021-01-12T07:52:44Z","abstract":[{"lang":"eng","text":"We present a detailed study of the local density of states (LDOS) associated with the surface-state band near a step edge of the strong topological insulator Bi2Te3 and reveal a one-dimensional bound state that runs parallel to the step edge and is bound to it at some characteristic distance. This bound state is clearly observed in the bulk gap region, while it becomes entangled with the oscillations of the warped surface band at high energy, and with the valence-band states near the Dirac point. We obtain excellent fits to theoretical predictions [Alpichshev, 2011] that properly incorporate the three-dimensional nature of the problem to the surface state. Fitting the data at different energies, we can recalculate the LDOS originating from the Dirac band without the contribution of the bulk bands or incoherent tunneling effects. "}],"type":"journal_article","oa_version":"Preprint","month":"07","_id":"386","year":"2011","main_file_link":[{"url":"https://arxiv.org/abs/1003.2233","open_access":"1"}],"date_published":"2011-07-21T00:00:00Z","publication_status":"published","oa":1,"citation":{"ieee":"Z. Alpichshev, J. G. Analytis, J. H. Chu, I. R. Fisher, and A. Kapitulnik, “STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3,” <i>Physical Review B - Condensed Matter and Materials Physics</i>, vol. 84, no. 4. American Physical Society, 2011.","chicago":"Alpichshev, Zhanybek, J G Analytis, J H Chu, I R Fisher, and A Kapitulnik. “STM Imaging of a Bound State along a Step on the Surface of the Topological Insulator Bi2Te3.” <i>Physical Review B - Condensed Matter and Materials Physics</i>. American Physical Society, 2011. <a href=\"https://doi.org/10.1103/PhysRevB.84.041104\">https://doi.org/10.1103/PhysRevB.84.041104</a>.","short":"Z. Alpichshev, J.G. Analytis, J.H. Chu, I.R. Fisher, A. Kapitulnik, Physical Review B - Condensed Matter and Materials Physics 84 (2011).","ama":"Alpichshev Z, Analytis JG, Chu JH, Fisher IR, Kapitulnik A. STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. <i>Physical Review B - Condensed Matter and Materials Physics</i>. 2011;84(4). doi:<a href=\"https://doi.org/10.1103/PhysRevB.84.041104\">10.1103/PhysRevB.84.041104</a>","ista":"Alpichshev Z, Analytis JG, Chu JH, Fisher IR, Kapitulnik A. 2011. STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. Physical Review B - Condensed Matter and Materials Physics. 84(4).","mla":"Alpichshev, Zhanybek, et al. “STM Imaging of a Bound State along a Step on the Surface of the Topological Insulator Bi2Te3.” <i>Physical Review B - Condensed Matter and Materials Physics</i>, vol. 84, no. 4, American Physical Society, 2011, doi:<a href=\"https://doi.org/10.1103/PhysRevB.84.041104\">10.1103/PhysRevB.84.041104</a>.","apa":"Alpichshev, Z., Analytis, J. G., Chu, J. H., Fisher, I. R., &#38; Kapitulnik, A. (2011). STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3. <i>Physical Review B - Condensed Matter and Materials Physics</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevB.84.041104\">https://doi.org/10.1103/PhysRevB.84.041104</a>"},"extern":"1","intvolume":"        84","status":"public","external_id":{"arxiv":["1003.2233"]},"publist_id":"7443","title":"STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3","arxiv":1,"day":"21","author":[{"full_name":"Alpichshev, Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","first_name":"Zhanybek","last_name":"Alpichshev"},{"full_name":"Analytis, J G","first_name":"J G","last_name":"Analytis"},{"full_name":"Chu, J H","first_name":"J H","last_name":"Chu"},{"last_name":"Fisher","first_name":"I R","full_name":"Fisher, I R"},{"first_name":"A","last_name":"Kapitulnik","full_name":"Kapitulnik, A"}],"article_processing_charge":"No","article_type":"original","publication":"Physical Review B - Condensed Matter and Materials Physics","publisher":"American Physical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","quality_controlled":"1","doi":"10.1103/PhysRevB.84.041104","language":[{"iso":"eng"}],"issue":"4"},{"publication_status":"published","oa":1,"main_file_link":[{"open_access":"1","url":"https://arxiv.org/pdf/0908.0371.pdf"}],"doi":"10.1103/PhysRevLett.104.016401","date_published":"2010-01-04T00:00:00Z","status":"public","issue":"1","language":[{"iso":"eng"}],"citation":{"ieee":"Z. Alpichshev <i>et al.</i>, “STM imaging of electronic waves on the surface of Bi2Te3 Topologically protected surface states and hexagonal warping effects,” <i>Physical Review Letters</i>, vol. 104, no. 1. American Physical Society, 2010.","chicago":"Alpichshev, Zhanybek, James Analytis, Jiunhaw Chu, Ian Fisher, Yulin Chen, Zhixun Shen, Aiping Fang, and Aharon Kapitulnik. “STM Imaging of Electronic Waves on the Surface of Bi2Te3 Topologically Protected Surface States and Hexagonal Warping Effects.” <i>Physical Review Letters</i>. American Physical Society, 2010. <a href=\"https://doi.org/10.1103/PhysRevLett.104.016401\">https://doi.org/10.1103/PhysRevLett.104.016401</a>.","short":"Z. Alpichshev, J. Analytis, J. Chu, I. Fisher, Y. Chen, Z. Shen, A. Fang, A. Kapitulnik, Physical Review Letters 104 (2010).","ama":"Alpichshev Z, Analytis J, Chu J, et al. STM imaging of electronic waves on the surface of Bi2Te3 Topologically protected surface states and hexagonal warping effects. <i>Physical Review Letters</i>. 2010;104(1). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.104.016401\">10.1103/PhysRevLett.104.016401</a>","ista":"Alpichshev Z, Analytis J, Chu J, Fisher I, Chen Y, Shen Z, Fang A, Kapitulnik A. 2010. STM imaging of electronic waves on the surface of Bi2Te3 Topologically protected surface states and hexagonal warping effects. Physical Review Letters. 104(1).","mla":"Alpichshev, Zhanybek, et al. “STM Imaging of Electronic Waves on the Surface of Bi2Te3 Topologically Protected Surface States and Hexagonal Warping Effects.” <i>Physical Review Letters</i>, vol. 104, no. 1, American Physical Society, 2010, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.104.016401\">10.1103/PhysRevLett.104.016401</a>.","apa":"Alpichshev, Z., Analytis, J., Chu, J., Fisher, I., Chen, Y., Shen, Z., … Kapitulnik, A. (2010). STM imaging of electronic waves on the surface of Bi2Te3 Topologically protected surface states and hexagonal warping effects. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.104.016401\">https://doi.org/10.1103/PhysRevLett.104.016401</a>"},"extern":"1","intvolume":"       104","oa_version":"None","type":"journal_article","month":"01","date_updated":"2021-01-12T07:52:39Z","abstract":[{"text":"Scanning tunneling spectroscopy studies on high-quality Bi2Te3 crystals exhibit perfect correspondence to angle-resolved photoemission spectroscopy data, hence enabling identification of different regimes measured in the local density of states (LDOS). Oscillations of LDOS near a step are analyzed. Within the main part of the surface band oscillations are strongly damped, supporting the hypothesis of topological protection. At higher energies, as the surface band becomes concave, oscillations appear, dispersing with a wave vector that may result from a hexagonal warping term. ","lang":"eng"}],"day":"04","author":[{"first_name":"Zhanybek","last_name":"Alpichshev","full_name":"Alpichshev, Zhanybek","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203"},{"full_name":"Analytis, James","first_name":"James","last_name":"Analytis"},{"full_name":"Chu, Jiunhaw","last_name":"Chu","first_name":"Jiunhaw"},{"first_name":"Ian","last_name":"Fisher","full_name":"Fisher, Ian"},{"full_name":"Chen, Yulin","first_name":"Yulin","last_name":"Chen"},{"last_name":"Shen","first_name":"Zhixun","full_name":"Shen, Zhixun"},{"first_name":"Aiping","last_name":"Fang","full_name":"Fang, Aiping"},{"full_name":"Kapitulnik, Aharon","last_name":"Kapitulnik","first_name":"Aharon"}],"publist_id":"7444","date_created":"2018-12-11T11:46:10Z","volume":104,"title":"STM imaging of electronic waves on the surface of Bi2Te3 Topologically protected surface states and hexagonal warping effects","year":"2010","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"American Physical Society","_id":"385","publication":"Physical Review Letters"}]