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Tunable-phi Josephson junction with a quantum anomalous Hall insulator

PhysRevB.96.224514.pdf717.92 kBPDF見る/開く

タイトル: Tunable-phi Josephson junction with a quantum anomalous Hall insulator
著者: Sakurai, Keimei 著作を一覧する
Ikegaya, Satoshi 著作を一覧する
Asano, Yasuhiro 著作を一覧する
発行日: 2017年12月27日
出版者: American Physical Society (APS)
誌名: Physical Review B
巻: 96
号: 22
開始ページ: 224514
出版社 DOI: 10.1103/PhysRevB.96.224514
抄録: We theoretically study the Josephson current in a superconductor/quantum anomalous Hall insulator/superconductor junction by using the lattice Green function technique. When an in-plane external Zeeman field is applied to the quantum anomalous Hall insulator, the Josephson current J flows without a phase difference across the junction theta. The phase shift phi appearing in the current-phase relationship J alpha sin(theta - phi) is proportional to the amplitude of Zeeman fields and depends on the direction ofZeeman fields. Aphenomenological analysis of the Andreev reflection processes explains the physical origin of phi. In a quantum anomalous Hall insulator, time-reversal symmetry and mirror-reflection symmetry are broken simultaneously. However, magnetic mirror-reflection symmetry is preserved. Such characteristic symmetry properties enable us to have a tunable phi junction with a quantum Hall insulator.
Rights: ©2017 American Physical Society
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 浅野 泰寛


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