Spin Currents Induced by Nonuniform Rashba-Type Spin-Orbit Field

被引：2

作者：

Tsutsui, Kazuhiro ^{[1
,2
]}

Takeuchi, Akihito ^{[2
]}

Tatara, Gen ^{[2
]}

Murakami, Shuichi ^{[1
,3
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[2] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

[3] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 08期

基金：

日本学术振兴会;

关键词：

spintronics; spin-orbit coupling; spin relaxation torque; spin current; spin sink; spin source; Keldysh Green's function formalism; METAL INTERFACE;

D O I：

10.1143/JPSJ.80.084701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the spin relaxation torque in nonmagnetic or ferromagnetic metals with nonuniform spin-orbit coupling within the Keldysh Green's function formalism. In non-magnet, the relaxation torque is shown to arise when the spin-orbit coupling is not uniform. In the absence of an external field, the spin current induced by the relaxation torque is proportional to the vector chirality of Rashba-type spin-orbit field (RSOF). In the presence of an external field, on the other hand, spin relaxation torque arises from the coupling of the external field and vector chirality of RSOF. Our result indicates that spin-sink or source effects are controlled by designing RSOF in junctions.

引用

页数：4

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