Magnetoresistance due to edge spin accumulation
Magnetoresistance due to edge spin accumulation
复制标题
DOI：
10.1103/physrevlett.99.126601
复制
发表时间：
2007-09-21
影响因子：
8.6
通讯作者：
Dyakonov, M. I.
中科院分区：
文献类型：
--
作者：
Dyakonov, M. I.
由于自旋-轨道相互作用，电流伴随着自旋电流，导致样品边缘附近的自旋积累。由于自旋轨道相互作用，这导致样品电阻的小幅度下降。外加磁场将破坏边缘自旋极化导致正磁阻。这一效应为通过电测量研究自旋积累提供了手段。讨论了描述电荷与自旋电流耦合的现象学方程的起源和一般性质。
Because of spin-orbit interaction, an electrical current is accompanied by a spin current resulting in spin accumulation near the sample edges. Due again to spin-orbit interaction this causes a small decrease of the sample resistance. An applied magnetic field will destroy the edge spin polarization leading to a positive magnetoresistance. This effect provides means to study spin accumulation by electrical measurements. The origin and the general properties of the phenomenological equations describing coupling between charge and spin currents are also discussed.