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      Large superconducting diode effect in ion-beam patterned Sn-based superconductor nanowire/topological Dirac semimetal planar heterostructures

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          Abstract

          High-quality superconductor/topological material heterostructures are highly desired for realisation of topological superconductivity and Majorana physics. Here, we demonstrate a method to directly draw nanoscale superconducting β-Sn patterns in the plane of a topological Dirac semimetal (TDS) α-Sn thin film by irradiating a focused ion beam and taking advantage of the heat-driven phase transition of α-Sn into superconducting β-Sn. The β-Sn nanowires embedded in a TDS α-Sn thin film exhibit a large superconducting diode effect (SDE), whose rectification ratio η reaches a maximum of 35% when the magnetic field is applied parallel to the current. The results suggest that the SDE may occur at the α-Sn/β-Sn interfaces where the TDS α-Sn becomes superconducting by a proximity effect. Our work thus provides a universal platform for investigating quantum physics and devices based on topological superconducting circuits of any shape.

          Abstract

          Topological superconductivity may have important implications for fault-tolerant quantum computing, but its practical implementation remains challenging. Here, the authors report the fabrication of nanoscale heterojunctions based on superconducting β-Sn and topological Dirac semimetal α-Sn, showing superconducting diode rectification ratios up to 35%.

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          Most cited references56

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          Unpaired Majorana fermions in quantum wires

          A. Kitaev (2001)
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            Superconducting proximity effect and majorana fermions at the surface of a topological insulator.

            We study the proximity effect between an s-wave superconductor and the surface states of a strong topological insulator. The resulting two-dimensional state resembles a spinless px+ipy superconductor, but does not break time reversal symmetry. This state supports Majorana bound states at vortices. We show that linear junctions between superconductors mediated by the topological insulator form a nonchiral one-dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating, and fusing Majorana bound states.
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              Topological superconductors: a review

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                Author and article information

                Contributors
                anh@cryst.t.u-tokyo.ac.jp
                masaaki@ee.t.u-tokyo.ac.jp
                Journal
                Nat Commun
                Nat Commun
                Nature Communications
                Nature Publishing Group UK (London )
                2041-1723
                30 September 2024
                30 September 2024
                2024
                : 15
                : 8014
                Affiliations
                [1 ]Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, ( https://ror.org/057zh3y96) Tokyo, Japan
                [2 ]PRESTO, Japan Science and Technology Agency, Kawaguchi, ( https://ror.org/00097mb19) Saitama, Japan
                [3 ]Centre for Spintronics Research Network, The University of Tokyo, Bunkyo-ku, ( https://ror.org/057zh3y96) Tokyo, Japan
                [4 ]Institute for Nano Quantum Information Electronics, The University of Tokyo, Komaba, Meguro-ku, ( https://ror.org/057zh3y96) Tokyo, Japan
                Author information
                http://orcid.org/0000-0002-5708-8352
                http://orcid.org/0000-0002-9968-1410
                http://orcid.org/0000-0003-3599-663X
                Article
                52080
                10.1038/s41467-024-52080-4
                11442514
                39349453
                1f72596b-2700-4b3c-896d-34a18be94f9d
                © The Author(s) 2024

                Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

                History
                : 21 September 2023
                : 26 August 2024
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100001691, MEXT | Japan Society for the Promotion of Science (JSPS);
                Award ID: 24H00018
                Award ID: 20H05650
                Award ID: 23K17324
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/501100009023, MEXT | JST | Precursory Research for Embryonic Science and Technology (PRESTO);
                Award ID: JPMJPR19LB
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/501100008662, Murata Science Foundation;
                Funded by: UTEC-UTokyo FSI
                Funded by: FundRef https://doi.org/10.13039/501100003382, MEXT | JST | Core Research for Evolutional Science and Technology (CREST);
                Award ID: JPMJCR1777
                Award Recipient :
                Funded by: Spintronics Research Network of Japan (Spin-RNJ)
                Categories
                Article
                Custom metadata
                © Springer Nature Limited 2024

                Uncategorized
                superconducting devices,electrical and electronic engineering,topological matter

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