Costa, Andreas and Hoegl, Petra and Fabian, Jaroslav (2017) Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions. PHYSICAL REVIEW B, 95 (2): 024514. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We study theoretically the effects of interfacial Rashba and Dresselhaus spin-orbit coupling in superconductor/ ferromagnet/superconductor (S/F/S) Josephson junctions-with allowing for tunneling barriers between the ferromagnetic and superconducting layers-by solving the Bogoljubov-de Gennes equation for realistic heterostructures and applying the Furusaki-Tsukada technique to calculate the electric current at a finite temperature. The presence of spin-orbit couplings leads to out-of-plane and in-plane magnetoanisotropies of the Josephson current, which are giant in comparison to current magnetoanisotropies in similar normal-state ferromagnet/normal metal (F/N) junctions. Especially huge anisotropies appear in the vicinity of 0-pi transitions, caused by the exchange-split bands in the ferromagnetic metal layer. We also show that the direction of the Josephson critical current can be controlled (inducing 0-pi transitions) by the strength of the spin-orbit coupling and, more crucial, by the orientation of the magnetization. Such a control can bring new functionalities into Josephson junction devices.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SUPERCONDUCTOR-FERROMAGNET STRUCTURES; ANDREEV REFLECTION; MAJORANA FERMIONS; SPINTRONICS; HETEROSTRUCTURES; NANOWIRE; SUPERCURRENTS; CIRCUITS; PHASE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:01 |
| Last Modified: | 27 Feb 2019 11:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/537 |
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