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Insight into the skew-scattering mechanism of the spin Hall effect: Potential scattering versus spin-orbit scattering

机译:洞察自旋霍尔效应的歪斜散射机制:势散射与自旋轨道散射

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摘要

We present a detailed analysis of the skew-scattering contribution to the spin Hall conductivity using an extended version of the resonant scattering model of Fert and Levy [Phys. Rev. Lett. 106,157208 (2011)]. For 5d impurities in a Cu host, the proposed phase shift model reproduces the corresponding first-principles calculations. Crucial for that agreement is the consideration of two scattering channels related to p and d impurity states since the discussed mechanism is governed by a subtle interplay between the spin-orbit and potential scattering in both angular-momentum channels. It is shown that the potential scattering strength plays a decisive role for the magnitude of the spin Hall conductivity.
机译:我们使用Fert和Levy的共振散射模型的扩展版本[Phys。牧师106,157208(2011)]。对于Cu主体中的5d杂质,建议的相移模型将重现相应的第一性原理计算。该协议的关键是考虑与p和d杂质态有关的两个散射通道,因为所讨论的机制受两个角动量通道中自旋轨道和势散射之间的微妙相互作用控制。结果表明,潜在的散射强度对于自旋霍尔电导率的大小起着决定性的作用。

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