Spin Hall effect of alloys: Extrinsic and intrinsic contribution

Details Spin Hall effect of alloys: Extrinsic and intrinsic contribution Spin Hall effect of alloys: Extrinsic and intrinsic contribution

2010-10-26

arxiv.org/abs/1010.5520v1

Physics

Condensed Matter

Materials Science

Scientific paper

A fully relativistic description of the spin-orbit induced spin Hall effect is presented that is based on Kubo's linear response formalism. Using an appropriate operator for the spin current density a Kubo-St\v{r}eda-like equation for the spin Hall conductivity (SHC) is obtained. An implementation using the Korringa-Kohn-Rostoker (KKR) band structure method in combination with the Coherent Potential Approximation (CPA) allow detailed investigations on various alloy systems. A decomposition of the SHC into intrinsic and extrinsic contributions is suggested. Accompanying calculations for the skew-scattering contribution of the SHC using the Boltzmann equation demonstrate the equivalence to the Kubo formalism in the dilute alloy regime and support the suggested decomposition scheme.

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