Spin current through a tunnel junction

被引：20

作者：

Braun, M

König, J

Martinek, J

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 3, D-44780 Bochum, Germany

[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[3] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2005年 / 37卷 / 05期

关键词：

D O I：

10.1016/j.spmi.2004.11.005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We derive an expression for the spin current through a tunnel barrier in terms of many-body Green's functions. The spin cur-rent has two possible contributions. One is associated with angular momentum transfer due to spin-polarized charge current crossing the junction. If there are magnetic moments on both sides of the tunnel junction, due to spin accumulation or ferromagnetic ordering, then there is a second contribution related to the exchange coupling between the moments. © 2004 Elsevier Ltd. All rights reserved.

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页码：333 / 336

页数：4

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