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Asymmetric Josephson effect in inversion symmetry breaking topological materials
Topological materials which possess topologically protected surface states have attracted much attention in recent years. In this work, we study the critical current of superconductor/inversion symmetry breaking topological material/superconductor junctions. We found surprisingly that, in topologica...
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Published in: | Physical review. B 2018-08, Vol.98 (7), p.075430, Article 075430 |
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creator | Chen, Chui-Zhen He, James Jun Ali, Mazhar N. Lee, Gil-Ho Fong, Kin Chung Law, K. T. |
description | Topological materials which possess topologically protected surface states have attracted much attention in recent years. In this work, we study the critical current of superconductor/inversion symmetry breaking topological material/superconductor junctions. We found surprisingly that, in topological materials with broken inversion symmetry, the magnitude of the critical Josephson currents |Ic+(B)| at fixed magnetic field B is not the same for critical currents |Ic−(B)| flowing in the opposite direction. Moreover, the critical currents violate the |Ic±(B)|=|Ic±(−B)| relation and give rise to asymmetric Fraunhofer patterns. We call this phenomenon asymmetric Josephson effect (AJE). AJE can be used to detect inversion symmetry breaking in topological materials such as in quantum spin Hall systems and Weyl semimetals. |
doi_str_mv | 10.1103/PhysRevB.98.075430 |
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AJE can be used to detect inversion symmetry breaking in topological materials such as in quantum spin Hall systems and Weyl semimetals.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.98.075430</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Asymmetry ; Broken symmetry ; Critical current (superconductivity) ; Josephson effect ; Metalloids ; Superconductor junctions ; Symmetry</subject><ispartof>Physical review. 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AJE can be used to detect inversion symmetry breaking in topological materials such as in quantum spin Hall systems and Weyl semimetals.</description><subject>Asymmetry</subject><subject>Broken symmetry</subject><subject>Critical current (superconductivity)</subject><subject>Josephson effect</subject><subject>Metalloids</subject><subject>Superconductor junctions</subject><subject>Symmetry</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNo9kF1LwzAUhoMoOOb-gFcFrzuTpklzLufwE8Eheh2SNNky16Ym3aD_3sqmcOA9vDycAw9C1wTPCcH0drUZ0rs93M1BzHHFSorP0KQoOeQAHM7_d4Yv0SylLcaYcAwVhglaLdLQNLaP3mQvIdluk0KbWees6TPfjnOwMfmxO3FDpqNVX75dZ33owi6svVG7rFG9jV7t0hW6cGPY2Smn6PPh_mP5lL--PT4vF6-5oYD7vNLKaGZEybnQvK5JCZwJrsu6sAY7QQRVwGsmmK4rLhi4mo-1pk4JYLyiU3RzvNvF8L23qZfbsI_t-FIWpOBAOKPFSBVHysSQUrROdtE3Kg6SYPkrT_7JkyDkUR79AZVfZU8</recordid><startdate>20180827</startdate><enddate>20180827</enddate><creator>Chen, Chui-Zhen</creator><creator>He, James Jun</creator><creator>Ali, Mazhar N.</creator><creator>Lee, Gil-Ho</creator><creator>Fong, Kin Chung</creator><creator>Law, K. 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B</jtitle><date>2018-08-27</date><risdate>2018</risdate><volume>98</volume><issue>7</issue><spage>075430</spage><pages>075430-</pages><artnum>075430</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Topological materials which possess topologically protected surface states have attracted much attention in recent years. In this work, we study the critical current of superconductor/inversion symmetry breaking topological material/superconductor junctions. We found surprisingly that, in topological materials with broken inversion symmetry, the magnitude of the critical Josephson currents |Ic+(B)| at fixed magnetic field B is not the same for critical currents |Ic−(B)| flowing in the opposite direction. Moreover, the critical currents violate the |Ic±(B)|=|Ic±(−B)| relation and give rise to asymmetric Fraunhofer patterns. We call this phenomenon asymmetric Josephson effect (AJE). 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subjects | Asymmetry Broken symmetry Critical current (superconductivity) Josephson effect Metalloids Superconductor junctions Symmetry |
title | Asymmetric Josephson effect in inversion symmetry breaking topological materials |
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