Triplet supercurrent in ferromagnetic Josephson junctions by spin injection

被引：13

作者：

Mal'shukov, A. G. ^{[1
]}

Brataas, Arne ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Oblast, Russia

[2] Norwegian Univ Sci & Technol, Dept Phys, NO-7491 Trondheim, Norway

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 09期

关键词：

PI-SHIFTERS; METALS; FLUX; SUPERCONDUCTIVITY; TRANSPORT;

D O I：

10.1103/PhysRevB.86.094517

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that injecting nonequilibrium spins into the superconducting leads strongly enhances the stationary Josephson current through a superconductor-ferromagnet-superconductor junction. The resulting long-range supercurrent through a ferromagnet is carried by triplet Cooper pairs that are formed in s-wave superconductors by the combined effects of spin injection and exchange interaction. We quantify the exchange interaction in terms of Landau Fermi-liquid factors. The magnitude and direction of the long-range Josephson current can be manipulated by varying the angles of the injected polarizations with respect to the magnetization in the ferromagnet.

引用

页数：5