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.
引用
收藏
页码：333 / 336
页数：4
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