|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Proximity effect in a ferromagnetic semiconductor with spin-orbit interactions
| Title: | Proximity effect in a ferromagnetic semiconductor with spin-orbit interactions |
| Authors: | Yamashita, Taketoki Browse this author | | Lee, Jaechul Browse this author | | Habe, Tetsuro Browse this author | | Asano, Yasuhiro Browse this author →KAKEN DB |
| Issue Date: | 3-Sep-2019 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 100 |
| Issue: | 9 |
| Start Page: | 094501 |
| Publisher DOI: | 10.1103/PhysRevB.100.094501 |
| Abstract: | We study theoretically the proximity effect in a ferromagnetic semiconductor with the Rashba spin-orbit interaction. The interplay between the exchange potential and the spin-orbit interactions enriches the symmetry variety of Cooper pairs depending on degree of disorder in a ferromagnet. In the ballistic limit, spin-singlet s-wave Cooper pairs are the most dominant in the presence of strong spin-orbit interaction because the spin-momentum locking stabilizes a Cooper pair consisting of two electrons of time-reversal partner to each other. We will show that the spin-orbit interactions generate equal-spin-triplet p-wave pairs. In the dirty regime, on the other hand, equal-spin-triplet s-wave pairs are dominant because random impurity potentials release the locking. The exchange splitting in the conduction band causes the imbalance between two equal-spin pairing components. In a half-metallic ferromagnet, only an equal-spin pairing component survives and carries the spin-polarized supercurrent. We discuss the effects of the spin-orbit interaction on the Josephson current. |
| Rights: | ©2019 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75615 |
| 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)
|
Submitter: 浅野 泰寛
|
