[{"language":[{"iso":"eng"}],"month":"03","article_number":"126803","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"oa_version":"Published Version","project":[{"_id":"26A151DA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"844511","name":"Majorana bound states in Ge/SiGe heterostructures"},{"grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"name":"Hole spin orbit qubits in Ge quantum wells","grant_number":"P30207","call_identifier":"FWF","_id":"2641CE5E-B435-11E9-9278-68D0E5697425"},{"grant_number":"I05060","name":"High impedance circuit quantum electrodynamics with hole spins","_id":"c0977eea-5a5b-11eb-8a69-a862db0cf4d1"},{"grant_number":"M03032","name":"Long-range spin exchange for 2D qubits architectures","_id":"c08c05c4-5a5b-11eb-8a69-dc6ce49d7973"}],"publication":"Physical Review Letters","has_accepted_license":"1","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","status":"public","file":[{"success":1,"relation":"main_file","access_level":"open_access","file_id":"10928","creator":"dernst","date_created":"2022-03-28T06:53:39Z","checksum":"6e66ad548d18db9c131f304acbd5a1f4","file_size":1266515,"date_updated":"2022-03-28T06:53:39Z","content_type":"application/pdf","file_name":"2022_PhysRevLetters_Jirovec.pdf"}],"oa":1,"publication_identifier":{"eissn":["1079-7114"]},"date_published":"2022-03-24T00:00:00Z","type":"journal_article","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"article_type":"original","publisher":"American Physical Society","file_date_updated":"2022-03-28T06:53:39Z","ec_funded":1,"quality_controlled":"1","title":"Dynamics of hole singlet-triplet qubits with large g-factor differences","intvolume":"       128","publication_status":"published","date_created":"2022-03-24T15:51:11Z","department":[{"_id":"GradSch"},{"_id":"GeKa"}],"article_processing_charge":"No","author":[{"full_name":"Jirovec, Daniel","orcid":"0000-0002-7197-4801","last_name":"Jirovec","first_name":"Daniel","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Mutter, Philipp M.","last_name":"Mutter","first_name":"Philipp M."},{"id":"340F461A-F248-11E8-B48F-1D18A9856A87","last_name":"Hofmann","first_name":"Andrea C","full_name":"Hofmann, Andrea C"},{"id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425","first_name":"Alessandro","last_name":"Crippa","orcid":"0000-0002-2968-611X","full_name":"Crippa, Alessandro"},{"full_name":"Rychetsky, Marek","first_name":"Marek","last_name":"Rychetsky"},{"full_name":"Craig, David L.","first_name":"David L.","last_name":"Craig"},{"id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","full_name":"Kukucka, Josip","first_name":"Josip","last_name":"Kukucka"},{"first_name":"Frederico","last_name":"Martins","orcid":"0000-0003-2668-2401","full_name":"Martins, Frederico","id":"38F80F9A-1CB8-11EA-BC76-B49B3DDC885E"},{"first_name":"Andrea","last_name":"Ballabio","full_name":"Ballabio, Andrea"},{"first_name":"Natalia","last_name":"Ares","full_name":"Ares, Natalia"},{"last_name":"Chrastina","first_name":"Daniel","full_name":"Chrastina, Daniel"},{"last_name":"Isella","first_name":"Giovanni","full_name":"Isella, Giovanni"},{"full_name":"Burkard, Guido ","last_name":"Burkard","first_name":"Guido "},{"first_name":"Georgios","last_name":"Katsaros","full_name":"Katsaros, Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"issue":"12","_id":"10920","ddc":["530"],"acknowledgement":"This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the nanofabrication facility. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie\r\nSkłodowska-Curie Grant Agreement No. 844511, No. 75441, and by the FWF-P 30207, I05060, and M3032-N projects. A. B. acknowledges support from the EU Horizon-2020 FET project microSPIRE, ID: 766955. P.M. M. and G. B. acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG—German Research Foundation) under Project No. 450396347. This work was supported by the Royal Society (URF\\R1\\191150) and the European Research Council (Grant Agreement No. 948932), N. A. acknowledges the use of the University of Oxford Advanced Research Computing (ARC) facility.","volume":128,"abstract":[{"text":"The spin-orbit interaction permits to control the state of a spin qubit via electric fields. For holes it is particularly strong, allowing for fast all electrical qubit manipulation, and yet an in-depth understanding of this interaction in hole systems is missing. Here we investigate, experimentally and theoretically, the effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states by studying singlet-triplet oscillations in a planar Ge hole double quantum dot. Landau-Zener sweeps at different magnetic field directions allow us to disentangle the effects of the spin-orbit induced spin-flip term from those caused by strongly site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides new insights into the hole spin-orbit interaction, necessary for optimizing future qubit experiments.","lang":"eng"}],"doi":"10.1103/PhysRevLett.128.126803","arxiv":1,"day":"24","isi":1,"external_id":{"arxiv":["2111.05130"],"isi":["000786542500004"]},"date_updated":"2023-08-03T06:14:58Z","year":"2022","citation":{"chicago":"Jirovec, Daniel, Philipp M. Mutter, Andrea C Hofmann, Alessandro Crippa, Marek Rychetsky, David L. Craig, Josip Kukucka, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences.” <i>Physical Review Letters</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">https://doi.org/10.1103/PhysRevLett.128.126803</a>.","ieee":"D. Jirovec <i>et al.</i>, “Dynamics of hole singlet-triplet qubits with large g-factor differences,” <i>Physical Review Letters</i>, vol. 128, no. 12. American Physical Society, 2022.","apa":"Jirovec, D., Mutter, P. M., Hofmann, A. C., Crippa, A., Rychetsky, M., Craig, D. L., … Katsaros, G. (2022). Dynamics of hole singlet-triplet qubits with large g-factor differences. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">https://doi.org/10.1103/PhysRevLett.128.126803</a>","ama":"Jirovec D, Mutter PM, Hofmann AC, et al. Dynamics of hole singlet-triplet qubits with large g-factor differences. <i>Physical Review Letters</i>. 2022;128(12). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">10.1103/PhysRevLett.128.126803</a>","ista":"Jirovec D, Mutter PM, Hofmann AC, Crippa A, Rychetsky M, Craig DL, Kukucka J, Martins F, Ballabio A, Ares N, Chrastina D, Isella G, Burkard G, Katsaros G. 2022. Dynamics of hole singlet-triplet qubits with large g-factor differences. Physical Review Letters. 128(12), 126803.","mla":"Jirovec, Daniel, et al. “Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences.” <i>Physical Review Letters</i>, vol. 128, no. 12, 126803, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.128.126803\">10.1103/PhysRevLett.128.126803</a>.","short":"D. Jirovec, P.M. Mutter, A.C. Hofmann, A. Crippa, M. Rychetsky, D.L. Craig, J. Kukucka, F. Martins, A. Ballabio, N. Ares, D. Chrastina, G. Isella, G. Burkard, G. Katsaros, Physical Review Letters 128 (2022)."}},{"publication":"Nature","month":"12","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"oa_version":"Preprint","project":[{"call_identifier":"H2020","_id":"26A151DA-B435-11E9-9278-68D0E5697425","grant_number":"844511","name":"Majorana bound states in Ge/SiGe heterostructures"}],"language":[{"iso":"eng"}],"keyword":["Multidisciplinary"],"date_published":"2022-12-15T00:00:00Z","type":"journal_article","oa":1,"publication_identifier":{"eissn":["1476-4687"],"issn":["0028-0836"]},"status":"public","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"13286"},{"id":"12522","relation":"research_data","status":"public"}],"link":[{"relation":"press_release","description":"News on ISTA Website","url":"https://ista.ac.at/en/news/imposter-particles-revealed-and-explained/"}]},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2203.07829"}],"author":[{"id":"C0BB2FAC-D767-11E9-B658-BC13E6697425","last_name":"Valentini","first_name":"Marco","full_name":"Valentini, Marco"},{"id":"2ac7a0a2-3562-11eb-9256-fbd18ea55087","last_name":"Borovkov","first_name":"Maksim","full_name":"Borovkov, Maksim"},{"last_name":"Prada","first_name":"Elsa","full_name":"Prada, Elsa"},{"full_name":"Martí-Sánchez, Sara","first_name":"Sara","last_name":"Martí-Sánchez"},{"first_name":"Marc","last_name":"Botifoll","full_name":"Botifoll, Marc"},{"first_name":"Andrea C","last_name":"Hofmann","full_name":"Hofmann, Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Arbiol, Jordi","last_name":"Arbiol","first_name":"Jordi"},{"full_name":"Aguado, Ramón","last_name":"Aguado","first_name":"Ramón"},{"full_name":"San-Jose, Pablo","first_name":"Pablo","last_name":"San-Jose"},{"last_name":"Katsaros","first_name":"Georgios","full_name":"Katsaros, Georgios","orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"issue":"7940","_id":"12118","scopus_import":"1","title":"Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks","intvolume":"       612","publication_status":"published","date_created":"2023-01-12T11:56:45Z","department":[{"_id":"GeKa"}],"article_processing_charge":"No","page":"442-447","ec_funded":1,"quality_controlled":"1","article_type":"original","publisher":"Springer Nature","isi":1,"external_id":{"isi":["000899725400001"],"arxiv":["2203.07829"]},"date_updated":"2024-02-21T12:35:33Z","citation":{"ista":"Valentini M, Borovkov M, Prada E, Martí-Sánchez S, Botifoll M, Hofmann AC, Arbiol J, Aguado R, San-Jose P, Katsaros G. 2022. Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks. Nature. 612(7940), 442–447.","short":"M. Valentini, M. Borovkov, E. Prada, S. Martí-Sánchez, M. Botifoll, A.C. Hofmann, J. Arbiol, R. Aguado, P. San-Jose, G. Katsaros, Nature 612 (2022) 442–447.","mla":"Valentini, Marco, et al. “Majorana-like Coulomb Spectroscopy in the Absence of Zero-Bias Peaks.” <i>Nature</i>, vol. 612, no. 7940, Springer Nature, 2022, pp. 442–47, doi:<a href=\"https://doi.org/10.1038/s41586-022-05382-w\">10.1038/s41586-022-05382-w</a>.","chicago":"Valentini, Marco, Maksim Borovkov, Elsa Prada, Sara Martí-Sánchez, Marc Botifoll, Andrea C Hofmann, Jordi Arbiol, Ramón Aguado, Pablo San-Jose, and Georgios Katsaros. “Majorana-like Coulomb Spectroscopy in the Absence of Zero-Bias Peaks.” <i>Nature</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41586-022-05382-w\">https://doi.org/10.1038/s41586-022-05382-w</a>.","ieee":"M. Valentini <i>et al.</i>, “Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks,” <i>Nature</i>, vol. 612, no. 7940. Springer Nature, pp. 442–447, 2022.","apa":"Valentini, M., Borovkov, M., Prada, E., Martí-Sánchez, S., Botifoll, M., Hofmann, A. C., … Katsaros, G. (2022). Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks. <i>Nature</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41586-022-05382-w\">https://doi.org/10.1038/s41586-022-05382-w</a>","ama":"Valentini M, Borovkov M, Prada E, et al. Majorana-like Coulomb spectroscopy in the absence of zero-bias peaks. <i>Nature</i>. 2022;612(7940):442-447. doi:<a href=\"https://doi.org/10.1038/s41586-022-05382-w\">10.1038/s41586-022-05382-w</a>"},"year":"2022","abstract":[{"lang":"eng","text":"Hybrid semiconductor–superconductor devices hold great promise for realizing topological quantum computing with Majorana zero modes1,2,3,4,5. However, multiple claims of Majorana detection, based on either tunnelling6,7,8,9,10 or Coulomb blockade (CB) spectroscopy11,12, remain disputed. Here we devise an experimental protocol that allows us to perform both types of measurement on the same hybrid island by adjusting its charging energy via tunable junctions to the normal leads. This method reduces ambiguities of Majorana detections by checking the consistency between CB spectroscopy and zero-bias peaks in non-blockaded transport. Specifically, we observe junction-dependent, even–odd modulated, single-electron CB peaks in InAs/Al hybrid nanowires without concomitant low-bias peaks in tunnelling spectroscopy. We provide a theoretical interpretation of the experimental observations in terms of low-energy, longitudinally confined island states rather than overlapping Majorana modes. Our results highlight the importance of combined measurements on the same device for the identification of topological Majorana zero modes."}],"doi":"10.1038/s41586-022-05382-w","arxiv":1,"day":"15","acknowledgement":"We thank P. Krogstrup for providing us with the NW materials. We thank A. Higginbotham, E. J. H. Lee, C. Marcus and S. Vaitiekėnas for helpful discussions and G. Steffensen for his input on the diffusive Little-Parks theory. This research was supported by the Scientific Service Units of ISTA through resources provided by the MIBA Machine Shop and the nanofabrication facility; the NOMIS Foundation; the CSIC Interdisciplinary Thematic Platform (PTI+) on Quantum Technologies (PTI-QTEP+). A.H. acknowledges support from H2020-MSCA-IF-2018/844511. ICN2 also acknowledges funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo Ochoa Program from Spanish MINECO (Grant no. SEV-2017-0706) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autònoma de Barcelona Materials Science PhD programme. Authors acknowledge the use of instrumentation as well as the technical advice provided by the National Facility ELECMI ICTS, node ‘Laboratorio de Microscopías Avanzadas’ at University of Zaragoza. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 823717-ESTEEM3. This study was supported by MCIN with funding from European Union NextGenerationEU (PRTR-C17.I1) and Generalitat de Catalunya. This research is part of the CSIC programme for the Spanish Recovery, Transformation and Resilience Plan funded by the Recovery and Resilience Facility of the European Union, established by the Regulation (EU) 2020/2094. We thank support from Grant PGC2018-097018-BI00, project FlagERA TOPOGRAPH (PCI2018-093026) and project NANOGEN (PID2020-116093RB-C43), funded by MCIN/AEI/10.13039/501100011033/ and by ‘ERDF A way of making Europe’, by the European Union. M. Botifoll acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund (project ref. 2020 FI 00103).","volume":612},{"isi":1,"external_id":{"arxiv":["2011.13755"],"isi":["000657596400001"]},"date_updated":"2024-03-25T23:30:14Z","year":"2021","citation":{"short":"D. Jirovec, A.C. Hofmann, A. Ballabio, P.M. Mutter, G. Tavani, M. Botifoll, A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez Mollejo, I. Prieto Gonzalez, M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, G. Katsaros, Nature Materials 20 (2021) 1106–1112.","mla":"Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” <i>Nature Materials</i>, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:<a href=\"https://doi.org/10.1038/s41563-021-01022-2\">10.1038/s41563-021-01022-2</a>.","ista":"Jirovec D, Hofmann AC, Ballabio A, Mutter PM, Tavani G, Botifoll M, Crippa A, Kukucka J, Sagi O, Martins F, Saez Mollejo J, Prieto Gonzalez I, Borovkov M, Arbiol J, Chrastina D, Isella G, Katsaros G. 2021. A singlet triplet hole spin qubit in planar Ge. Nature Materials. 20(8), 1106–1112.","ama":"Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit in planar Ge. <i>Nature Materials</i>. 2021;20(8):1106–1112. doi:<a href=\"https://doi.org/10.1038/s41563-021-01022-2\">10.1038/s41563-021-01022-2</a>","apa":"Jirovec, D., Hofmann, A. C., Ballabio, A., Mutter, P. M., Tavani, G., Botifoll, M., … Katsaros, G. (2021). A singlet triplet hole spin qubit in planar Ge. <i>Nature Materials</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41563-021-01022-2\">https://doi.org/10.1038/s41563-021-01022-2</a>","chicago":"Jirovec, Daniel, Andrea C Hofmann, Andrea Ballabio, Philipp M. Mutter, Giulio Tavani, Marc Botifoll, Alessandro Crippa, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” <i>Nature Materials</i>. Springer Nature, 2021. <a href=\"https://doi.org/10.1038/s41563-021-01022-2\">https://doi.org/10.1038/s41563-021-01022-2</a>.","ieee":"D. Jirovec <i>et al.</i>, “A singlet triplet hole spin qubit in planar Ge,” <i>Nature Materials</i>, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021."},"abstract":[{"text":"Spin qubits are considered to be among the most promising candidates for building a quantum processor. Group IV hole spin qubits have moved into the focus of interest due to the ease of operation and compatibility with Si technology. In addition, Ge offers the option for monolithic superconductor-semiconductor integration. Here we demonstrate a hole spin qubit operating at fields below 10 mT, the critical field of Al, by exploiting the large out-of-plane hole g-factors in planar Ge and by encoding the qubit into the singlet-triplet states of a double quantum dot. We observe electrically controlled X and Z-rotations with tunable frequencies exceeding 100 MHz and dephasing times of 1μs which we extend beyond 15μs with echo techniques. These results show that Ge hole singlet triplet qubits outperform their electronic Si and GaAs based counterparts in speed and coherence, respectively. In addition, they are on par with Ge single spin qubits, but can be operated at much lower fields underlining their potential for on chip integration with superconducting technologies.","lang":"eng"}],"doi":"10.1038/s41563-021-01022-2","arxiv":1,"day":"01","volume":20,"acknowledgement":"This research was supported by the Scientific Service Units of Institute of Science and Technology (IST) Austria through resources provided by the Miba Machine Shop and the nanofabrication facility, and was made possible with the support of the NOMIS Foundation. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreements no. 844511 and no. 75441, and by the Austrian Science Fund FWF-P 30207 project. A.B. acknowledges support from the European Union Horizon 2020 FET project microSPIRE, no. 766955. M. Botifoll and J.A. acknowledge funding from Generalitat de Catalunya 2017 SGR 327. The Catalan Institute of Nanoscience and Nanotechnology (ICN2) is supported by the Severo Ochoa programme from the Spanish Ministery of Economy (MINECO) (grant no. SEV-2017-0706) and is funded by the Catalonian Research Centre (CERCA) Programme, Generalitat de Catalunya. Part of the present work has been performed within the framework of the Universitat Autónoma de Barcelona Materials Science PhD programme. Part of the HAADF scanning transmission electron microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon, Universidad de Zaragoza. ICN2 acknowledge support from the Spanish Superior Council of Scientific Research (CSIC) Research Platform on Quantum Technologies PTI-001. M.B. acknowledges funding from the Catalan Agency for Management of University and Research Grants (AGAUR) Generalitat de Catalunya formation of investigators (FI) PhD grant.","author":[{"id":"4C473F58-F248-11E8-B48F-1D18A9856A87","first_name":"Daniel","last_name":"Jirovec","orcid":"0000-0002-7197-4801","full_name":"Jirovec, Daniel"},{"last_name":"Hofmann","first_name":"Andrea C","full_name":"Hofmann, Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Ballabio, Andrea","first_name":"Andrea","last_name":"Ballabio"},{"last_name":"Mutter","first_name":"Philipp M.","full_name":"Mutter, Philipp M."},{"first_name":"Giulio","last_name":"Tavani","full_name":"Tavani, Giulio"},{"full_name":"Botifoll, Marc","first_name":"Marc","last_name":"Botifoll"},{"id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425","orcid":"0000-0002-2968-611X","full_name":"Crippa, Alessandro","first_name":"Alessandro","last_name":"Crippa"},{"first_name":"Josip","last_name":"Kukucka","full_name":"Kukucka, Josip","id":"3F5D8856-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Oliver","last_name":"Sagi","full_name":"Sagi, Oliver","id":"71616374-A8E9-11E9-A7CA-09ECE5697425"},{"id":"38F80F9A-1CB8-11EA-BC76-B49B3DDC885E","full_name":"Martins, Frederico","orcid":"0000-0003-2668-2401","last_name":"Martins","first_name":"Frederico"},{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","first_name":"Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714"},{"id":"2A307FE2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7370-5357","full_name":"Prieto Gonzalez, Ivan","first_name":"Ivan","last_name":"Prieto Gonzalez"},{"last_name":"Borovkov","first_name":"Maksim","full_name":"Borovkov, Maksim","id":"2ac7a0a2-3562-11eb-9256-fbd18ea55087"},{"first_name":"Jordi","last_name":"Arbiol","full_name":"Arbiol, Jordi"},{"full_name":"Chrastina, Daniel","last_name":"Chrastina","first_name":"Daniel"},{"full_name":"Isella, Giovanni","last_name":"Isella","first_name":"Giovanni"},{"first_name":"Georgios","last_name":"Katsaros","orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"issue":"8","_id":"8909","scopus_import":"1","title":"A singlet triplet hole spin qubit in planar Ge","intvolume":"        20","publication_status":"published","date_created":"2020-12-02T10:50:47Z","department":[{"_id":"GeKa"},{"_id":"NanoFab"},{"_id":"GradSch"}],"article_processing_charge":"No","page":"1106–1112","ec_funded":1,"quality_controlled":"1","article_type":"original","publisher":"Springer Nature","date_published":"2021-08-01T00:00:00Z","type":"journal_article","oa":1,"publication_identifier":{"eissn":["1476-4660"],"issn":["1476-1122"]},"status":"public","related_material":{"record":[{"id":"9323","relation":"research_data","status":"public"},{"status":"public","id":"10058","relation":"dissertation_contains"}],"link":[{"description":"News on IST Homepage","relation":"press_release","url":"https://ist.ac.at/en/news/quantum-computing-with-holes/"}]},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2011.13755"}],"publication":"Nature Materials","month":"08","oa_version":"Preprint","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"project":[{"name":"Majorana bound states in Ge/SiGe heterostructures","grant_number":"844511","call_identifier":"H2020","_id":"26A151DA-B435-11E9-9278-68D0E5697425"},{"name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"_id":"2641CE5E-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Hole spin orbit qubits in Ge quantum wells","grant_number":"P30207"},{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"}],"language":[{"iso":"eng"}]},{"related_material":{"link":[{"url":"https://ist.ac.at/en/news/unfinding-a-split-electron/","description":"News on IST Homepage","relation":"press_release"}],"record":[{"relation":"dissertation_contains","id":"13286","status":"public"},{"relation":"research_data","id":"9389","status":"public"}]},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","status":"public","main_file_link":[{"url":"https://arxiv.org/abs/2008.02348","open_access":"1"}],"type":"journal_article","date_published":"2021-07-02T00:00:00Z","oa":1,"publication_identifier":{"issn":["00368075"],"eissn":["10959203"]},"language":[{"iso":"eng"}],"publication":"Science","article_number":"82-88","month":"07","project":[{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"},{"grant_number":"844511","name":"Majorana bound states in Ge/SiGe heterostructures","call_identifier":"H2020","_id":"26A151DA-B435-11E9-9278-68D0E5697425"}],"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"oa_version":"Submitted Version","volume":373,"acknowledgement":"The authors thank A. Higginbotham, E. J. H. Lee and F. R. Martins for helpful discussions. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility; the NOMIS Foundation and Microsoft; the European Union’s Horizon 2020 research and innovation program under the Marie SklodowskaCurie grant agreement No 844511; the FETOPEN Grant Agreement No. 828948; the European Research Commission through the grant agreement HEMs-DAM No 716655; the Spanish Ministry of Science and Innovation through Grants PGC2018-097018-B-I00, PCI2018-093026, FIS2016-80434-P (AEI/FEDER, EU), RYC2011-09345 (Ram´on y Cajal Programme), and the Mar´ıa de Maeztu Programme for Units of Excellence in R&D (CEX2018-000805-M); the CSIC Research Platform on Quantum Technologies PTI-001.","external_id":{"isi":["000677843100034"],"arxiv":["2008.02348"]},"isi":1,"citation":{"apa":"Valentini, M., Peñaranda, F., Hofmann, A. C., Brauns, M., Hauschild, R., Krogstrup, P., … Katsaros, G. (2021). Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. <i>Science</i>. American Association for the Advancement of Science. <a href=\"https://doi.org/10.1126/science.abf1513\">https://doi.org/10.1126/science.abf1513</a>","ama":"Valentini M, Peñaranda F, Hofmann AC, et al. Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. <i>Science</i>. 2021;373(6550). doi:<a href=\"https://doi.org/10.1126/science.abf1513\">10.1126/science.abf1513</a>","chicago":"Valentini, Marco, Fernando Peñaranda, Andrea C Hofmann, Matthias Brauns, Robert Hauschild, Peter Krogstrup, Pablo San-Jose, Elsa Prada, Ramón Aguado, and Georgios Katsaros. “Nontopological Zero-Bias Peaks in Full-Shell Nanowires Induced by Flux-Tunable Andreev States.” <i>Science</i>. American Association for the Advancement of Science, 2021. <a href=\"https://doi.org/10.1126/science.abf1513\">https://doi.org/10.1126/science.abf1513</a>.","ieee":"M. Valentini <i>et al.</i>, “Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states,” <i>Science</i>, vol. 373, no. 6550. American Association for the Advancement of Science, 2021.","mla":"Valentini, Marco, et al. “Nontopological Zero-Bias Peaks in Full-Shell Nanowires Induced by Flux-Tunable Andreev States.” <i>Science</i>, vol. 373, no. 6550, 82–88, American Association for the Advancement of Science, 2021, doi:<a href=\"https://doi.org/10.1126/science.abf1513\">10.1126/science.abf1513</a>.","short":"M. Valentini, F. Peñaranda, A.C. Hofmann, M. Brauns, R. Hauschild, P. Krogstrup, P. San-Jose, E. Prada, R. Aguado, G. Katsaros, Science 373 (2021).","ista":"Valentini M, Peñaranda F, Hofmann AC, Brauns M, Hauschild R, Krogstrup P, San-Jose P, Prada E, Aguado R, Katsaros G. 2021. Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. Science. 373(6550), 82–88."},"year":"2021","date_updated":"2024-02-21T12:40:09Z","abstract":[{"lang":"eng","text":"A semiconducting nanowire fully wrapped by a superconducting shell has been proposed as a platform for obtaining Majorana modes at small magnetic fields. In this study, we demonstrate that the appearance of subgap states in such structures is actually governed by the junction region in tunneling spectroscopy measurements and not the full-shell nanowire itself. Short tunneling regions never show subgap states, whereas longer junctions always do. This can be understood in terms of quantum dots forming in the junction and hosting Andreev levels in the Yu-Shiba-Rusinov regime. The intricate magnetic field dependence of the Andreev levels, through both the Zeeman and Little-Parks effects, may result in robust zero-bias peaks—features that could be easily misinterpreted as originating from Majorana zero modes but are unrelated to topological superconductivity."}],"day":"02","doi":"10.1126/science.abf1513","arxiv":1,"quality_controlled":"1","ec_funded":1,"article_type":"original","publisher":"American Association for the Advancement of Science","issue":"6550","author":[{"id":"C0BB2FAC-D767-11E9-B658-BC13E6697425","full_name":"Valentini, Marco","last_name":"Valentini","first_name":"Marco"},{"full_name":"Peñaranda, Fernando","last_name":"Peñaranda","first_name":"Fernando"},{"full_name":"Hofmann, Andrea C","last_name":"Hofmann","first_name":"Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87"},{"id":"33F94E3C-F248-11E8-B48F-1D18A9856A87","full_name":"Brauns, Matthias","first_name":"Matthias","last_name":"Brauns"},{"full_name":"Hauschild, Robert","orcid":"0000-0001-9843-3522","last_name":"Hauschild","first_name":"Robert","id":"4E01D6B4-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Krogstrup, Peter","last_name":"Krogstrup","first_name":"Peter"},{"full_name":"San-Jose, Pablo","first_name":"Pablo","last_name":"San-Jose"},{"full_name":"Prada, Elsa","first_name":"Elsa","last_name":"Prada"},{"first_name":"Ramón","last_name":"Aguado","full_name":"Aguado, Ramón"},{"full_name":"Katsaros, Georgios","orcid":"0000-0001-8342-202X","last_name":"Katsaros","first_name":"Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"scopus_import":"1","_id":"8910","intvolume":"       373","title":"Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states","department":[{"_id":"GeKa"},{"_id":"Bio"}],"date_created":"2020-12-02T10:51:52Z","article_processing_charge":"No","publication_status":"published"},{"ddc":["620"],"acknowledgement":"This research and related results were made possible with the support of the NOMIS Foundation. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility, the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant agreement No. 844511 Grant Agreement No. 862046. ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2017-0706) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autnoma de Barcelona Materials Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza. Authors acknowledge the LMA-INA for offering access to their instruments and expertise. We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001. This project has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 823717 ESTEEM3. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. G.S. and M.V. acknowledge support through a projectruimte grant associated with the Netherlands Organization of Scientific Research (NWO). J.D. acknowledges support through FRIPRO-project 274853, which is funded by the Research Council of Norway.","volume":3,"external_id":{"arxiv":["2012.00322"]},"year":"2021","citation":{"ieee":"K. Aggarwal <i>et al.</i>, “Enhancement of proximity-induced superconductivity in a planar Ge hole gas,” <i>Physical Review Research</i>, vol. 3, no. 2. American Physical Society, 2021.","chicago":"Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez, Amir Sammak, Marc Botifoll, Sara Martí-Sánchez, et al. “Enhancement of Proximity-Induced Superconductivity in a Planar Ge Hole Gas.” <i>Physical Review Research</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/physrevresearch.3.l022005\">https://doi.org/10.1103/physrevresearch.3.l022005</a>.","apa":"Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A., Botifoll, M., … Katsaros, G. (2021). Enhancement of proximity-induced superconductivity in a planar Ge hole gas. <i>Physical Review Research</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevresearch.3.l022005\">https://doi.org/10.1103/physrevresearch.3.l022005</a>","ama":"Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity-induced superconductivity in a planar Ge hole gas. <i>Physical Review Research</i>. 2021;3(2). doi:<a href=\"https://doi.org/10.1103/physrevresearch.3.l022005\">10.1103/physrevresearch.3.l022005</a>","ista":"Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M, Martí-Sánchez S, Veldhorst M, Arbiol J, Scappucci G, Danon J, Katsaros G. 2021. Enhancement of proximity-induced superconductivity in a planar Ge hole gas. Physical Review Research. 3(2), L022005.","short":"K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M. Botifoll, S. Martí-Sánchez, M. Veldhorst, J. Arbiol, G. Scappucci, J. Danon, G. Katsaros, Physical Review Research 3 (2021).","mla":"Aggarwal, Kushagra, et al. “Enhancement of Proximity-Induced Superconductivity in a Planar Ge Hole Gas.” <i>Physical Review Research</i>, vol. 3, no. 2, L022005, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/physrevresearch.3.l022005\">10.1103/physrevresearch.3.l022005</a>."},"date_updated":"2024-02-21T12:41:26Z","abstract":[{"lang":"eng","text":"Hole gases in planar germanium can have high mobilities in combination with strong spin-orbit interaction and electrically tunable g factors, and are therefore emerging as a promising platform for creating hybrid superconductor-semiconductor devices. A key challenge towards hybrid Ge-based quantum technologies is the design of high-quality interfaces and superconducting contacts that are robust against magnetic fields. In this work, by combining the assets of aluminum, which provides good contact to the Ge, and niobium, which has a significant superconducting gap, we demonstrate highly transparent low-disordered JoFETs with relatively large ICRN products that are capable of withstanding high magnetic fields. We furthermore demonstrate the ability of phase-biasing individual JoFETs, opening up an avenue to explore topological superconductivity in planar Ge. The persistence of superconductivity in the reported hybrid devices beyond 1.8 T paves the way towards integrating spin qubits and proximity-induced superconductivity on the same chip."}],"day":"15","doi":"10.1103/physrevresearch.3.l022005","arxiv":1,"file_date_updated":"2021-12-17T08:12:37Z","quality_controlled":"1","ec_funded":1,"article_type":"original","publisher":"American Physical Society","issue":"2","author":[{"orcid":"0000-0001-9985-9293","full_name":"Aggarwal, Kushagra","first_name":"Kushagra","last_name":"Aggarwal","id":"b22ab905-3539-11eb-84c3-fc159dcd79cb"},{"id":"340F461A-F248-11E8-B48F-1D18A9856A87","full_name":"Hofmann, Andrea C","first_name":"Andrea C","last_name":"Hofmann"},{"first_name":"Daniel","last_name":"Jirovec","orcid":"0000-0002-7197-4801","full_name":"Jirovec, Daniel","id":"4C473F58-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Prieto Gonzalez, Ivan","orcid":"0000-0002-7370-5357","last_name":"Prieto Gonzalez","first_name":"Ivan","id":"2A307FE2-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Sammak","first_name":"Amir","full_name":"Sammak, Amir"},{"full_name":"Botifoll, Marc","last_name":"Botifoll","first_name":"Marc"},{"first_name":"Sara","last_name":"Martí-Sánchez","full_name":"Martí-Sánchez, Sara"},{"last_name":"Veldhorst","first_name":"Menno","full_name":"Veldhorst, Menno"},{"full_name":"Arbiol, Jordi","last_name":"Arbiol","first_name":"Jordi"},{"full_name":"Scappucci, Giordano","last_name":"Scappucci","first_name":"Giordano"},{"full_name":"Danon, Jeroen","first_name":"Jeroen","last_name":"Danon"},{"orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","first_name":"Georgios","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"scopus_import":"1","_id":"10559","intvolume":"         3","title":"Enhancement of proximity-induced superconductivity in a planar Ge hole gas","article_processing_charge":"No","date_created":"2021-12-16T18:50:57Z","department":[{"_id":"GeKa"}],"publication_status":"published","related_material":{"record":[{"status":"public","id":"8831","relation":"earlier_version"},{"status":"public","relation":"research_data","id":"8834"}]},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","status":"public","file":[{"access_level":"open_access","relation":"main_file","success":1,"file_id":"10561","creator":"cchlebak","date_created":"2021-12-17T08:12:37Z","file_size":1917512,"checksum":"60a1bc9c9b616b1b155044bb8cfc6484","date_updated":"2021-12-17T08:12:37Z","file_name":"2021_PhysRevResearch_Aggarwal.pdf","content_type":"application/pdf"}],"type":"journal_article","date_published":"2021-04-15T00:00:00Z","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"oa":1,"publication_identifier":{"issn":["2643-1564"]},"keyword":["general engineering"],"language":[{"iso":"eng"}],"has_accepted_license":"1","publication":"Physical Review Research","article_number":"L022005","month":"04","project":[{"call_identifier":"H2020","_id":"26A151DA-B435-11E9-9278-68D0E5697425","name":"Majorana bound states in Ge/SiGe heterostructures","grant_number":"844511"},{"name":"TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS","grant_number":"862046","_id":"237E5020-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020"}],"oa_version":"Published Version","acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}]},{"abstract":[{"lang":"eng","text":"Holes in planar Ge have high mobilities, strong spin-orbit interaction and electrically tunable g-factors, and are therefore emerging as a promising candidate for hybrid superconductorsemiconductor devices. This is further motivated by the observation of supercurrent transport in planar Ge Josephson Field effect transistors (JoFETs). A key challenge towards hybrid germanium quantum technology is the design of high quality interfaces and superconducting contacts that are robust against magnetic fields. By combining the assets of Al, which has a long superconducting coherence, and Nb, which has a significant superconducting gap, we form low-disordered JoFETs with large ICRN products that are capable of withstanding high magnetic fields. We furthermore demonstrate the ability of phase-biasing individual JoFETs opening up an avenue to explore topological superconductivity in planar Ge. The persistence of superconductivity in the reported hybrid devices beyond 1.8 T paves the way towards integrating spin qubits and proximity-induced superconductivity on the same chip."}],"arxiv":1,"day":"02","external_id":{"arxiv":["2012.00322"]},"date_updated":"2024-03-25T23:30:14Z","citation":{"short":"K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M. Botifoll, S. Marti-Sanchez, M. Veldhorst, J. Arbiol, G. Scappucci, G. Katsaros, ArXiv (n.d.).","mla":"Aggarwal, Kushagra, et al. “Enhancement of Proximity Induced Superconductivity in Planar Germanium.” <i>ArXiv</i>, 2012.00322.","ista":"Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M, Marti-Sanchez S, Veldhorst M, Arbiol J, Scappucci G, Katsaros G. Enhancement of proximity induced superconductivity in planar Germanium. arXiv, 2012.00322.","ama":"Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity induced superconductivity in planar Germanium. <i>arXiv</i>.","apa":"Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A., Botifoll, M., … Katsaros, G. (n.d.). Enhancement of proximity induced superconductivity in planar Germanium. <i>arXiv</i>.","ieee":"K. Aggarwal <i>et al.</i>, “Enhancement of proximity induced superconductivity in planar Germanium,” <i>arXiv</i>. .","chicago":"Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez, Amir Sammak, Marc Botifoll, Sara Marti-Sanchez, et al. “Enhancement of Proximity Induced Superconductivity in Planar Germanium.” <i>ArXiv</i>, n.d."},"year":"2020","ddc":["530"],"acknowledgement":"This research and related results were made possible with the support of the NOMIS Foundation. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility, the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement #844511 and the Grant Agreement #862046. ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo Ochoa\r\nprogram from Spanish MINECO (Grant No. SEV2017-0706) and is funded by the CERCA Programme / Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Aut`onoma de Barcelona Materials Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza. Authors acknowledge the LMA-INA for offering access to their instruments and expertise. We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001. This project has received funding from\r\nthe European Union’s Horizon 2020 research and innovation programme under grant agreement No 823717 – ESTEEM3. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. GS and MV acknowledge support through a projectruimte grant associated with the Netherlands Organization of Scientific Research (NWO).","title":"Enhancement of proximity induced superconductivity in planar Germanium","publication_status":"submitted","article_processing_charge":"No","department":[{"_id":"GeKa"}],"date_created":"2020-12-02T10:42:53Z","author":[{"id":"b22ab905-3539-11eb-84c3-fc159dcd79cb","first_name":"Kushagra","last_name":"Aggarwal","orcid":"0000-0001-9985-9293","full_name":"Aggarwal, Kushagra"},{"first_name":"Andrea C","last_name":"Hofmann","full_name":"Hofmann, Andrea C","id":"340F461A-F248-11E8-B48F-1D18A9856A87"},{"id":"4C473F58-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7197-4801","full_name":"Jirovec, Daniel","first_name":"Daniel","last_name":"Jirovec"},{"last_name":"Prieto Gonzalez","first_name":"Ivan","full_name":"Prieto Gonzalez, Ivan","orcid":"0000-0002-7370-5357","id":"2A307FE2-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Sammak, Amir","last_name":"Sammak","first_name":"Amir"},{"first_name":"Marc","last_name":"Botifoll","full_name":"Botifoll, Marc"},{"first_name":"Sara","last_name":"Marti-Sanchez","full_name":"Marti-Sanchez, Sara"},{"last_name":"Veldhorst","first_name":"Menno","full_name":"Veldhorst, Menno"},{"first_name":"Jordi","last_name":"Arbiol","full_name":"Arbiol, Jordi"},{"full_name":"Scappucci, Giordano","last_name":"Scappucci","first_name":"Giordano"},{"id":"38DB5788-F248-11E8-B48F-1D18A9856A87","first_name":"Georgios","last_name":"Katsaros","orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios"}],"_id":"8831","file_date_updated":"2020-12-02T10:42:31Z","ec_funded":1,"oa":1,"date_published":"2020-12-02T00:00:00Z","type":"preprint","status":"public","related_material":{"record":[{"status":"public","relation":"later_version","id":"10559"},{"relation":"research_data","id":"8834","status":"public"},{"relation":"dissertation_contains","id":"10058","status":"public"}]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","file":[{"relation":"main_file","access_level":"open_access","creator":"gkatsaro","file_id":"8832","file_size":1697939,"checksum":"22a612e206232fa94b138b2c2f957582","date_created":"2020-12-02T10:42:31Z","content_type":"application/pdf","file_name":"Superconducting_2D_Ge.pdf","date_updated":"2020-12-02T10:42:31Z"}],"month":"12","article_number":"2012.00322","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"oa_version":"Submitted Version","project":[{"name":"Hybrid Semiconductor - Superconductor Quantum Devices","_id":"262116AA-B435-11E9-9278-68D0E5697425"},{"grant_number":"844511","name":"Majorana bound states in Ge/SiGe heterostructures","_id":"26A151DA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"_id":"237E5020-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","grant_number":"862046","name":"TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS"}],"publication":"arXiv","has_accepted_license":"1","language":[{"iso":"eng"}]},{"author":[{"id":"340F461A-F248-11E8-B48F-1D18A9856A87","first_name":"Andrea C","last_name":"Hofmann","full_name":"Hofmann, Andrea C"},{"id":"4C473F58-F248-11E8-B48F-1D18A9856A87","first_name":"Daniel","last_name":"Jirovec","orcid":"0000-0002-7197-4801","full_name":"Jirovec, Daniel"},{"last_name":"Borovkov","first_name":"Maxim","full_name":"Borovkov, Maxim"},{"id":"2A307FE2-F248-11E8-B48F-1D18A9856A87","last_name":"Prieto Gonzalez","first_name":"Ivan","full_name":"Prieto Gonzalez, Ivan","orcid":"0000-0002-7370-5357"},{"full_name":"Ballabio, Andrea","first_name":"Andrea","last_name":"Ballabio"},{"full_name":"Frigerio, Jacopo","last_name":"Frigerio","first_name":"Jacopo"},{"full_name":"Chrastina, Daniel","first_name":"Daniel","last_name":"Chrastina"},{"last_name":"Isella","first_name":"Giovanni","full_name":"Isella, Giovanni"},{"orcid":"0000-0001-8342-202X","full_name":"Katsaros, Georgios","first_name":"Georgios","last_name":"Katsaros","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"}],"_id":"10065","title":"Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits","publication_status":"submitted","date_created":"2021-10-01T12:14:51Z","department":[{"_id":"GeKa"}],"article_processing_charge":"No","ec_funded":1,"external_id":{"arxiv":["1910.05841"]},"date_updated":"2024-03-25T23:30:14Z","citation":{"ieee":"A. C. Hofmann <i>et al.</i>, “Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits,” <i>arXiv</i>. .","chicago":"Hofmann, Andrea C, Daniel Jirovec, Maxim Borovkov, Ivan Prieto Gonzalez, Andrea Ballabio, Jacopo Frigerio, Daniel Chrastina, Giovanni Isella, and Georgios Katsaros. “Assessing the Potential of Ge/SiGe Quantum Dots as Hosts for Singlet-Triplet Qubits.” <i>ArXiv</i>, n.d. <a href=\"https://doi.org/10.48550/arXiv.1910.05841\">https://doi.org/10.48550/arXiv.1910.05841</a>.","ama":"Hofmann AC, Jirovec D, Borovkov M, et al. Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. <i>arXiv</i>. doi:<a href=\"https://doi.org/10.48550/arXiv.1910.05841\">10.48550/arXiv.1910.05841</a>","apa":"Hofmann, A. C., Jirovec, D., Borovkov, M., Prieto Gonzalez, I., Ballabio, A., Frigerio, J., … Katsaros, G. (n.d.). Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. <i>arXiv</i>. <a href=\"https://doi.org/10.48550/arXiv.1910.05841\">https://doi.org/10.48550/arXiv.1910.05841</a>","ista":"Hofmann AC, Jirovec D, Borovkov M, Prieto Gonzalez I, Ballabio A, Frigerio J, Chrastina D, Isella G, Katsaros G. Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. arXiv, 1910.05841.","mla":"Hofmann, Andrea C., et al. “Assessing the Potential of Ge/SiGe Quantum Dots as Hosts for Singlet-Triplet Qubits.” <i>ArXiv</i>, 1910.05841, doi:<a href=\"https://doi.org/10.48550/arXiv.1910.05841\">10.48550/arXiv.1910.05841</a>.","short":"A.C. Hofmann, D. Jirovec, M. Borovkov, I. Prieto Gonzalez, A. Ballabio, J. Frigerio, D. Chrastina, G. Isella, G. Katsaros, ArXiv (n.d.)."},"year":"2019","abstract":[{"lang":"eng","text":"We study double quantum dots in a Ge/SiGe heterostructure and test their maturity towards singlet-triplet ($S-T_0$) qubits. We demonstrate a large range of tunability, from two single quantum dots to a double quantum dot. We measure Pauli spin blockade and study the anisotropy of the $g$-factor. We use an adjacent quantum dot for sensing charge transitions in the double quantum dot at interest. In conclusion, Ge/SiGe possesses all ingredients necessary for building a singlet-triplet qubit."}],"arxiv":1,"doi":"10.48550/arXiv.1910.05841","day":"13","acknowledgement":"We thank Matthias Brauns for helpful discussions and careful proofreading of the manuscript. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 844511 and from the FWF project P30207. The research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA machine shop and the nanofabrication\r\nfacility.","publication":"arXiv","month":"10","article_number":"1910.05841","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"oa_version":"Preprint","project":[{"grant_number":"844511","name":"Majorana bound states in Ge/SiGe heterostructures","call_identifier":"H2020","_id":"26A151DA-B435-11E9-9278-68D0E5697425"},{"call_identifier":"FWF","_id":"2641CE5E-B435-11E9-9278-68D0E5697425","grant_number":"P30207","name":"Hole spin orbit qubits in Ge quantum wells"}],"language":[{"iso":"eng"}],"date_published":"2019-10-13T00:00:00Z","type":"preprint","oa":1,"status":"public","related_material":{"record":[{"status":"public","relation":"dissertation_contains","id":"10058"}]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","main_file_link":[{"url":"https://arxiv.org/abs/1910.05841","open_access":"1"}]}]