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Tunable-phi Josephson junction with a quantum anomalous Hall insulator
| Title: | Tunable-phi Josephson junction with a quantum anomalous Hall insulator |
| Authors: | Sakurai, Keimei Browse this author | | Ikegaya, Satoshi Browse this author | | Asano, Yasuhiro Browse this author →KAKEN DB |
| Issue Date: | 27-Dec-2017 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 96 |
| Issue: | 22 |
| Start Page: | 224514 |
| Publisher DOI: | 10.1103/PhysRevB.96.224514 |
| Abstract: | 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 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/68257 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 浅野 泰寛
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