Chirality-controlled spontaneous currents in spin-orbit coupled superconducting rings

被引:15
|
作者
Robinson, J. W. A. [1 ]
Samokhvalov, A., V [2 ,3 ]
Buzdin, A., I [1 ,4 ,5 ]
机构
[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB3 0FS, England
[2] Russian Acad Sci, Inst Phys Microstruct, GSP 105, Nizhnii Novgorod 603950, Russia
[3] Lobachevsky State Univ Nizhni Novgorod, 23 Prospekt Gagarina, Nizhnii Novgorod 603950, Russia
[4] Univ Bordeaux, LOMA UMR CNRS 5798, F-33405 Talence, France
[5] Sechenov First Moscow State Med Univ, Moscow 119991, Russia
基金
英国工程与自然科学研究理事会; 俄罗斯基础研究基金会;
关键词
FERROMAGNET; SUPERCURRENTS;
D O I
10.1103/PhysRevB.99.180501
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
At a superconductor interface with a ferromagnetic insulator (FI), the FI acts to induce a local exchange field within the S layer, which in the presence of spin-orbit interaction promotes a phase- modulated superconducting state. Here we demonstrate that within a thin superconducting loop that is partially proximitized by a FI, spontaneous currents form with a magnetization-orientation-dependent chirality with sizable shifts in Little-Parks oscillations. Furthermore, the critical temperature of the loop is also magnetization-orientation-dependent and conversely, the superconducting transition itself may influence the magnetization direction. More generally, the superconducting region above the FI serves as a "phase battery" and so offers a new device concept for superconducting spintronics.
引用
收藏
页数:5
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