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arXiv · 1608.06333

Spin transport in half-metallic ferromagnets

Y. Ohnuma·M. Matsuo·S. Maekawa
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Abstract

We theoretically investigate spin transport in half-metallic ferromagnets at finite temperatures. The side-jump and skew-scattering contributions to spin Hall conductivity are derived using the Kubo formula. The electron-magnon interaction causes a finite density of states in the energy gap of the minority-spin band and induces spin Hall conductivity. We show that spin Hall conductivity is proportional to $T^{3/2}$, with $T$ being temperature and is sensitive to $T$. We propose that spin Hall conductivity may be a tool to study the minority-spin state.

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Y. Ohnuma, M. Matsuo, S. Maekawa. 2016-08-22. Spin transport in half-metallic ferromagnets. https://doi.org/10.1103/physrevb.94.184405

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