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arXiv 1808.04066cond-mat.mes-hall
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自旋-电荷转换效应的自旋关联函数理论

Spin correlation function theory of spin-charge conversion effects

Gen Tatara

摘要:

本文从物理量、自旋和电流的关联函数出发,介绍了自旋电子学中自旋-电荷转换效应的理论。研究了具有随机自旋轨道相互作用和空间非均匀Rashba相互作用的金属系统的正、逆自旋霍尔效应和自旋泵浦效应。该理论没有与自旋电流相关的模糊性,并提供了自旋-电荷转换效应的清晰物理图像。在本方法中,所谓的自旋电流传输效率实质上是磁化率的非均匀分量。

英文摘要:

Theory of spin-charge conversion effects in spintronics are presented in terms of correlation functions of physical observables, spin and electric current. Direct and inverse spin Hall effects and spin pumping effect are studied considering metallic systems with random spin-orbit interaction and spatially nonuniform Rashba interaction. The theory is free from ambiguity associated with spin current, and provides clear physical picture of the spin-charge conversion effects. In the present approach, so-called the spin current transmission efficiency is essentially the nonuniform component of magnetic susceptibility.

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