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arXiv · 1211.5549

Extrinsic Spin Hall Effect Due to Transition-Metal Impurities

Takuro Tanaka·Hiroshi Kontani
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Abstract

We investigate the extrinsic spin Hall effect in the electron gas model due to transition-metal impurities based on the single-impurity Anderson model with orbital degrees of freedom. Both the skew scattering and side jump mechanisms are analyzed in a unified way, and the significant role of orbital degrees of freedom are clarified. The obtained spin Hall conductivities are in proportion to the spin-orbit polarization at the Fermi level ($R = $) as is the case with the intrinsic spin Hall effect: skew scattering term $σ^{ss} ~ R δ_1/ρ$, and side jump term $σ^{sj} ~ R$, where $δ_1$ is the phase shift for $p$ ($l=1$) partial wave. Furthermore, the present study indicates the existence of a nontrivial close relationship between the intrinsic term $σ^{int}$ and the extrinsic side jump term $σ^{sj}$.

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Takuro Tanaka, Hiroshi Kontani. 2012-11-23. Extrinsic Spin Hall Effect Due to Transition-Metal Impurities. https://doi.org/10.1143/ptp.128.805

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