Theory of anomalous Hall and spin Hall effects in ferromagnetic metals

強磁性金属における異常ホール,スピンホール効果の理論

We give a unified theory of the anomalous Hall effect (AHE) and the spin Hall effect (SHE) in ferromagnetic metals (FM). We do this by extending Kondo theory of the AHE in FM and including the short range spin-spin correlations. We find a novel relation between the SHE and the second order nonlinear spin fluctuation in FM near Curie temperature Tc, which has been hidden for about 50 years, since Kondo gave a relation between the AHE and the first order nonlinear spin fluctuation in pure FM near Tc in 1962. Our results show an essential difference between the AHE and SHE in terms of the symmetry. Our theory can be applied to the recent SHE experiment in FM near Tc by Y. Otani et al.

使用言語	:	English
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発表会議名	:	American Physical Society March Meeting 2012
開催年月	:	2012/02
開催都市	:	Boston
開催国	:	U.S.A.
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受委託・共同研究相手機関	:	科学技術振興機構

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