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Costa, Andreas ; Högl, Petra ; Fabian, Jaroslav

Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions

Costa, Andreas , Högl, Petra and Fabian, Jaroslav (2017) Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions. Physical Review B 95, 024514.

Date of publication of this fulltext: 02 Aug 2018 06:28
Article
DOI to cite this document: 10.5283/epub.37567


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 ...

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.



Involved Institutions


Details

Item typeArticle
Journal or Publication TitlePhysical Review B
Publisher:AMER PHYSICAL SOC
Place of Publication:COLLEGE PK
Volume:95
Page Range:024514
Date26 January 2017
InstitutionsPhysics > Institute of Theroretical Physics
Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian
Identification Number
ValueType
10.1103/PhysRevB.95.024514DOI
KeywordsSUPERCONDUCTOR-FERROMAGNET STRUCTURES; ANDREEV REFLECTION; MAJORANA FERMIONS; SPINTRONICS; HETEROSTRUCTURES; NANOWIRE; SUPERCURRENTS; CIRCUITS; PHASE;
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgYes
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-375679
Item ID37567

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