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arXiv 0705.2738cond-mat.mes-hall
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边缘自旋积累引起的磁电阻效应

Magnetoresistance due to edge spin accumulation

M. I. Dyakonov

摘要:

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。再次由于自旋-轨道相互作用,这导致样品电阻的小幅降低。外加磁场将破坏边缘自旋极化,导致正磁阻。这种效应提供了通过电测量来研究自旋积累的手段。讨论了描述电荷流和自旋流耦合的唯象方程的起源和一般性质。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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