A spin triplet supercurrent in half metal ferromagnet/superconductor junctions with the interfacial Rashba spin-orbit coupling

被引：31
|
作者：
Niu, ZhiPing [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 210016, Jiangsu, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 06期
基金：
中国国家自然科学基金;
关键词：
SUPERCONDUCTOR-FERROMAGNET STRUCTURES; HETEROSTRUCTURES;
D O I：
10.1063/1.4743001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
dc Josephson currents in s-wave superconductor/half metal ferromagnet (HMF)/s-wave superconductor junctions are investigated. We propose the interfacial Rashba spin-orbit coupling as a possible mechanism giving rise to the spin flip Andreev reflection, which results in the singlet-triplet conversion at HMF/superconductor interfaces. When the magnetization direction of the HMF and that of the effective spin-orbit magnetic field are noncolinear, a long-ranged spin triplet supercurrent appears. The supercurrent strongly depends on the magnetization direction of the HMF and can be enhanced by the Rashba spin-orbit coupling strength. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4743001]
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