[{"scopus_import":"1","keyword":["General Physics and Astronomy"],"day":"01","has_accepted_license":"1","article_processing_charge":"Yes (in subscription journal)","publication":"Nature Physics","citation":{"ama":"Mukhopadhyay S, Senior JL, Saez Mollejo J, et al. Superconductivity from a melted insulator in Josephson junction arrays. Nature Physics. 2023;19:1630-1635. doi:10.1038/s41567-023-02161-w","ista":"Mukhopadhyay S, Senior JL, Saez Mollejo J, Puglia D, Zemlicka M, Fink JM, Higginbotham AP. 2023. Superconductivity from a melted insulator in Josephson junction arrays. Nature Physics. 19, 1630–1635.","apa":"Mukhopadhyay, S., Senior, J. L., Saez Mollejo, J., Puglia, D., Zemlicka, M., Fink, J. M., & Higginbotham, A. P. (2023). Superconductivity from a melted insulator in Josephson junction arrays. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-023-02161-w","ieee":"S. Mukhopadhyay et al., “Superconductivity from a melted insulator in Josephson junction arrays,” Nature Physics, vol. 19. Springer Nature, pp. 1630–1635, 2023.","mla":"Mukhopadhyay, Soham, et al. “Superconductivity from a Melted Insulator in Josephson Junction Arrays.” Nature Physics, vol. 19, Springer Nature, 2023, pp. 1630–35, doi:10.1038/s41567-023-02161-w.","short":"S. Mukhopadhyay, J.L. Senior, J. Saez Mollejo, D. Puglia, M. Zemlicka, J.M. Fink, A.P. Higginbotham, Nature Physics 19 (2023) 1630–1635.","chicago":"Mukhopadhyay, Soham, Jorden L Senior, Jaime Saez Mollejo, Denise Puglia, Martin Zemlicka, Johannes M Fink, and Andrew P Higginbotham. “Superconductivity from a Melted Insulator in Josephson Junction Arrays.” Nature Physics. Springer Nature, 2023. https://doi.org/10.1038/s41567-023-02161-w."},"article_type":"original","page":"1630-1635","date_published":"2023-11-01T00:00:00Z","type":"journal_article","abstract":[{"lang":"eng","text":"Arrays of Josephson junctions are governed by a competition between superconductivity and repulsive Coulomb interactions, and are expected to exhibit diverging low-temperature resistance when interactions exceed a critical level. Here we report a study of the transport and microwave response of Josephson arrays with interactions exceeding this level. Contrary to expectations, we observe that the array resistance drops dramatically as the temperature is decreased—reminiscent of superconducting behaviour—and then saturates at low temperature. Applying a magnetic field, we eventually observe a transition to a highly resistive regime. These observations can be understood within a theoretical picture that accounts for the effect of thermal fluctuations on the insulating phase. On the basis of the agreement between experiment and theory, we suggest that apparent superconductivity in our Josephson arrays arises from melting the zero-temperature insulator."}],"_id":"14032","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","ddc":["530"],"status":"public","title":"Superconductivity from a melted insulator in Josephson junction arrays","intvolume":" 19","file":[{"checksum":"1fc86d71bfbf836e221c1e925343adc5","success":1,"date_created":"2024-01-29T11:25:38Z","date_updated":"2024-01-29T11:25:38Z","relation":"main_file","file_id":"14899","file_size":1977706,"content_type":"application/pdf","creator":"dernst","access_level":"open_access","file_name":"2023_NaturePhysics_Mukhopadhyay.pdf"}],"oa_version":"Published Version","month":"11","publication_identifier":{"issn":["1745-2473"],"eissn":["1745-2481"]},"external_id":{"isi":["001054563800006"]},"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","short":"CC BY (4.0)","image":"/images/cc_by.png"},"oa":1,"isi":1,"quality_controlled":"1","project":[{"name":"Cavity electromechanics across a quantum phase transition","_id":"0aa3608a-070f-11eb-9043-e9cd8a2bd931","grant_number":"P33692"},{"grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020"},{"_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2","name":"Protected states of quantum matter"},{"_id":"bd5b4ec5-d553-11ed-ba76-a6eedb083344","name":"Protected states of quantum matter"}],"doi":"10.1038/s41567-023-02161-w","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"language":[{"iso":"eng"}],"file_date_updated":"2024-01-29T11:25:38Z","ec_funded":1,"license":"https://creativecommons.org/licenses/by/4.0/","acknowledgement":"We thank D. Haviland, J. Pekola, C. Ciuti, A. Bubis and A. Shnirman for helpful feedback on the paper. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the Nanofabrication Facility. Work supported by the Austrian FWF grant P33692-N (S.M., J.S. and A.P.H.), the European Union’s Horizon 2020 Research and Innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411 (J.S.) and a NOMIS foundation research grant (J.M.F. and A.P.H.).","year":"2023","publication_status":"published","publisher":"Springer Nature","department":[{"_id":"GradSch"},{"_id":"AnHi"},{"_id":"JoFi"}],"author":[{"last_name":"Mukhopadhyay","first_name":"Soham","id":"FDE60288-A89D-11E9-947F-1AF6E5697425","full_name":"Mukhopadhyay, Soham"},{"full_name":"Senior, Jorden L","last_name":"Senior","first_name":"Jorden L","orcid":"0000-0002-0672-9295","id":"5479D234-2D30-11EA-89CC-40953DDC885E"},{"full_name":"Saez Mollejo, Jaime","first_name":"Jaime","last_name":"Saez Mollejo","id":"e0390f72-f6e0-11ea-865d-862393336714"},{"last_name":"Puglia","first_name":"Denise","orcid":"0000-0003-1144-2763","id":"4D495994-AE37-11E9-AC72-31CAE5697425","full_name":"Puglia, Denise"},{"full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","first_name":"Martin","last_name":"Zemlicka"},{"id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8112-028X","first_name":"Johannes M","last_name":"Fink","full_name":"Fink, Johannes M"},{"orcid":"0000-0003-2607-2363","id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","last_name":"Higginbotham","first_name":"Andrew P","full_name":"Higginbotham, Andrew P"}],"date_updated":"2024-01-29T11:27:49Z","date_created":"2023-08-11T07:41:17Z","volume":19},{"issue":"8","abstract":[{"lang":"eng","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."}],"type":"journal_article","oa_version":"Preprint","intvolume":" 20","status":"public","title":"A singlet triplet hole spin qubit in planar Ge","_id":"8909","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","article_processing_charge":"No","day":"01","scopus_import":"1","date_published":"2021-08-01T00:00:00Z","page":"1106–1112","article_type":"original","citation":{"ama":"Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit in planar Ge. Nature Materials. 2021;20(8):1106–1112. doi:10.1038/s41563-021-01022-2","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.","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. Nature Materials. Springer Nature. https://doi.org/10.1038/s41563-021-01022-2","ieee":"D. Jirovec et al., “A singlet triplet hole spin qubit in planar Ge,” Nature Materials, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021.","mla":"Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” Nature Materials, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:10.1038/s41563-021-01022-2.","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.","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.” Nature Materials. Springer Nature, 2021. https://doi.org/10.1038/s41563-021-01022-2."},"publication":"Nature Materials","ec_funded":1,"volume":20,"date_created":"2020-12-02T10:50:47Z","date_updated":"2024-03-28T23:30:27Z","related_material":{"record":[{"status":"public","relation":"research_data","id":"9323"},{"relation":"dissertation_contains","status":"public","id":"10058"}],"link":[{"url":"https://ist.ac.at/en/news/quantum-computing-with-holes/","relation":"press_release","description":"News on IST Homepage"}]},"author":[{"full_name":"Jirovec, Daniel","first_name":"Daniel","last_name":"Jirovec","id":"4C473F58-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7197-4801"},{"full_name":"Hofmann, Andrea C","first_name":"Andrea C","last_name":"Hofmann","id":"340F461A-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Ballabio, Andrea","first_name":"Andrea","last_name":"Ballabio"},{"full_name":"Mutter, Philipp M.","last_name":"Mutter","first_name":"Philipp M."},{"first_name":"Giulio","last_name":"Tavani","full_name":"Tavani, Giulio"},{"full_name":"Botifoll, Marc","first_name":"Marc","last_name":"Botifoll"},{"full_name":"Crippa, Alessandro","first_name":"Alessandro","last_name":"Crippa","id":"1F2B21A2-F6E7-11E9-9B82-F7DBE5697425","orcid":"0000-0002-2968-611X"},{"last_name":"Kukucka","first_name":"Josip","id":"3F5D8856-F248-11E8-B48F-1D18A9856A87","full_name":"Kukucka, Josip"},{"first_name":"Oliver","last_name":"Sagi","id":"71616374-A8E9-11E9-A7CA-09ECE5697425","full_name":"Sagi, Oliver"},{"orcid":"0000-0003-2668-2401","id":"38F80F9A-1CB8-11EA-BC76-B49B3DDC885E","last_name":"Martins","first_name":"Frederico","full_name":"Martins, Frederico"},{"full_name":"Saez Mollejo, Jaime","last_name":"Saez Mollejo","first_name":"Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714"},{"full_name":"Prieto Gonzalez, Ivan","last_name":"Prieto Gonzalez","first_name":"Ivan","orcid":"0000-0002-7370-5357","id":"2A307FE2-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Borovkov","first_name":"Maksim","id":"2ac7a0a2-3562-11eb-9256-fbd18ea55087","full_name":"Borovkov, Maksim"},{"first_name":"Jordi","last_name":"Arbiol","full_name":"Arbiol, Jordi"},{"full_name":"Chrastina, Daniel","first_name":"Daniel","last_name":"Chrastina"},{"full_name":"Isella, Giovanni","first_name":"Giovanni","last_name":"Isella"},{"orcid":"0000-0001-8342-202X","id":"38DB5788-F248-11E8-B48F-1D18A9856A87","last_name":"Katsaros","first_name":"Georgios","full_name":"Katsaros, Georgios"}],"department":[{"_id":"GeKa"},{"_id":"NanoFab"},{"_id":"GradSch"}],"publisher":"Springer Nature","publication_status":"published","year":"2021","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.","publication_identifier":{"issn":["1476-1122"],"eissn":["1476-4660"]},"month":"08","language":[{"iso":"eng"}],"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"doi":"10.1038/s41563-021-01022-2","project":[{"grant_number":"844511","_id":"26A151DA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Majorana bound states in Ge/SiGe heterostructures"},{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"grant_number":"P30207","_id":"2641CE5E-B435-11E9-9278-68D0E5697425","name":"Hole spin orbit qubits in Ge quantum wells","call_identifier":"FWF"},{"_id":"262116AA-B435-11E9-9278-68D0E5697425","name":"Hybrid Semiconductor - Superconductor Quantum Devices"}],"quality_controlled":"1","isi":1,"external_id":{"isi":["000657596400001"],"arxiv":["2011.13755"]},"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2011.13755"}],"oa":1}]