[{"quality_controlled":"1","ddc":["530"],"date_updated":"2023-08-03T12:38:57Z","_id":"11737","type":"journal_article","doi":"10.1103/PhysRevB.106.045302","article_processing_charge":"No","publisher":"American Physical Society","acknowledgement":"This work was supported by the Austrian Science Funds (W 1243, I 3456-N27, I 5539-N).","date_published":"2022-07-15T00:00:00Z","status":"public","publication":"Physical Review B","year":"2022","isi":1,"external_id":{"isi":["000834349200010"]},"publication_identifier":{"eissn":["2469-9969"],"issn":["2469-9950"]},"publication_status":"published","file_date_updated":"2022-08-08T06:58:22Z","has_accepted_license":"1","license":"https://creativecommons.org/licenses/by/4.0/","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."}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"       106","volume":106,"article_type":"original","date_created":"2022-08-07T22:01:58Z","author":[{"orcid":"0000-0002-1648-0999","first_name":"Uladzislau","id":"6A9A37C2-8C5C-11E9-AE53-F2FDE5697425","full_name":"Dziom, Uladzislau","last_name":"Dziom"},{"first_name":"A.","full_name":"Shuvaev, A.","last_name":"Shuvaev"},{"full_name":"Gospodarič, J.","last_name":"Gospodarič","first_name":"J."},{"full_name":"Novik, E. G.","last_name":"Novik","first_name":"E. G."},{"full_name":"Dobretsova, A. A.","last_name":"Dobretsova","first_name":"A. A."},{"full_name":"Mikhailov, N. N.","last_name":"Mikhailov","first_name":"N. N."},{"first_name":"Z. D.","last_name":"Kvon","full_name":"Kvon, Z. D."},{"last_name":"Alpichshev","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","full_name":"Alpichshev, Zhanybek","first_name":"Zhanybek","orcid":"0000-0002-7183-5203"},{"full_name":"Pimenov, A.","last_name":"Pimenov","first_name":"A."}],"scopus_import":"1","day":"15","oa_version":"Published Version","title":"Universal transparency and asymmetric spin splitting near the Dirac point in HgTe quantum wells","issue":"4","citation":{"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>.","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>.","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.","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.","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).","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>"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"language":[{"iso":"eng"}],"department":[{"_id":"ZhAl"}],"article_number":"045302","file":[{"content_type":"application/pdf","access_level":"open_access","file_name":"2022_PhysRevB_Dziom.pdf","success":1,"checksum":"115aff9e0cde2f806cb26953d7262791","relation":"main_file","date_updated":"2022-08-08T06:58:22Z","creator":"dernst","file_size":774455,"date_created":"2022-08-08T06:58:22Z","file_id":"11743"}],"month":"07"},{"department":[{"_id":"ZhAl"}],"article_number":"2492","file":[{"creator":"dernst","date_updated":"2023-01-30T11:16:54Z","date_created":"2023-01-30T11:16:54Z","file_size":464840,"file_id":"12459","content_type":"application/pdf","access_level":"open_access","file_name":"2022_Nanomaterials_Shuvaev.pdf","success":1,"checksum":"efad6742f89f39a18bec63116dd689a0","relation":"main_file"}],"month":"07","issue":"14","citation":{"mla":"Shuvaev, Alexey, et al. “Band Structure near the Dirac Point in HgTe Quantum Wells with Critical Thickness.” <i>Nanomaterials</i>, vol. 12, no. 14, 2492, MDPI, 2022, doi:<a href=\"https://doi.org/10.3390/nano12142492\">10.3390/nano12142492</a>.","apa":"Shuvaev, A., Dziom, U., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov, N. N., … Pimenov, A. (2022). Band structure near the Dirac Point in HgTe quantum wells with critical thickness. <i>Nanomaterials</i>. MDPI. <a href=\"https://doi.org/10.3390/nano12142492\">https://doi.org/10.3390/nano12142492</a>","ista":"Shuvaev A, Dziom U, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon ZD, Pimenov A. 2022. Band structure near the Dirac Point in HgTe quantum wells with critical thickness. Nanomaterials. 12(14), 2492.","chicago":"Shuvaev, Alexey, Uladzislau Dziom, Jan Gospodarič, Elena G. Novik, Alena A. Dobretsova, Nikolay N. Mikhailov, Ze Don Kvon, and Andrei Pimenov. “Band Structure near the Dirac Point in HgTe Quantum Wells with Critical Thickness.” <i>Nanomaterials</i>. MDPI, 2022. <a href=\"https://doi.org/10.3390/nano12142492\">https://doi.org/10.3390/nano12142492</a>.","short":"A. Shuvaev, U. Dziom, J. Gospodarič, E.G. Novik, A.A. Dobretsova, N.N. Mikhailov, Z.D. Kvon, A. Pimenov, Nanomaterials 12 (2022).","ieee":"A. Shuvaev <i>et al.</i>, “Band structure near the Dirac Point in HgTe quantum wells with critical thickness,” <i>Nanomaterials</i>, vol. 12, no. 14. MDPI, 2022.","ama":"Shuvaev A, Dziom U, Gospodarič J, et al. Band structure near the Dirac Point in HgTe quantum wells with critical thickness. <i>Nanomaterials</i>. 2022;12(14). doi:<a href=\"https://doi.org/10.3390/nano12142492\">10.3390/nano12142492</a>"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"language":[{"iso":"eng"}],"volume":12,"article_type":"original","date_created":"2023-01-16T10:02:31Z","author":[{"first_name":"Alexey","full_name":"Shuvaev, Alexey","last_name":"Shuvaev"},{"last_name":"Dziom","full_name":"Dziom, Uladzislau","id":"6A9A37C2-8C5C-11E9-AE53-F2FDE5697425","orcid":"0000-0002-1648-0999","first_name":"Uladzislau"},{"first_name":"Jan","last_name":"Gospodarič","full_name":"Gospodarič, Jan"},{"first_name":"Elena G.","last_name":"Novik","full_name":"Novik, Elena G."},{"first_name":"Alena A.","last_name":"Dobretsova","full_name":"Dobretsova, Alena A."},{"last_name":"Mikhailov","full_name":"Mikhailov, Nikolay N.","first_name":"Nikolay N."},{"last_name":"Kvon","full_name":"Kvon, Ze Don","first_name":"Ze Don"},{"last_name":"Pimenov","full_name":"Pimenov, Andrei","first_name":"Andrei"}],"scopus_import":"1","day":"20","oa_version":"Published Version","title":"Band structure near the Dirac Point in HgTe quantum wells with critical thickness","publication_identifier":{"issn":["2079-4991"]},"publication_status":"published","file_date_updated":"2023-01-30T11:16:54Z","has_accepted_license":"1","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"abstract":[{"lang":"eng","text":"Mercury telluride (HgTe) thin films with a critical thickness of 6.5 nm are predicted to possess a gapless Dirac-like band structure. We report a comprehensive study on gated and optically doped samples by magnetooptical spectroscopy in the THz range. The quasi-classical analysis of the cyclotron resonance allowed the mapping of the band dispersion of Dirac charge carriers in a broad range of electron and hole doping. A smooth transition through the charge neutrality point between Dirac holes and electrons was observed. An additional peak coming from a second type of holes with an almost density-independent mass of around 0.04m0 was detected in the hole-doping range and attributed to an asymmetric spin splitting of the Dirac cone. Spectroscopic evidence for disorder-induced band energy fluctuations could not be detected in present cyclotron resonance experiments."}],"intvolume":"        12","keyword":["General Materials Science","General Chemical Engineering"],"isi":1,"year":"2022","external_id":{"isi":["000834401600001"]},"acknowledgement":"This work was supported by the Austrian Science Funds (W1243, I 3456-N27, I 5539-N).\r\nOpen Access Funding by the Austrian Science Fund (FWF).","date_published":"2022-07-20T00:00:00Z","publication":"Nanomaterials","status":"public","date_updated":"2023-10-17T11:41:28Z","_id":"12278","type":"journal_article","doi":"10.3390/nano12142492","article_processing_charge":"Yes","publisher":"MDPI","quality_controlled":"1","ddc":["530"]}]