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arXiv · 1806.06833

Impurity-induced vector spin chirality and anomalous Hall effect in ferromagnetic metals

Hiroaki Ishizuka·Naoto Nagaosa
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Abstract

Scattering by multiple scatterers sometimes gives rise to nontrivial consequences such as anomalous Hall effect. We here study a mechanism for anomalous Hall effect which originates from the correlation of nonmagnetic impurities and localized moments; a Hall effect induced by vector spin chirality. Using a scattering theory approach, we study the skew scattering induced by the scattering processes that involve two magnetic moments and a non-magnetic impurity, which is proportional to the vector spin chirality of the spins in the vicinity of the non-magnetic impurity. Furthermore, we show that a finite vector spin chirality naturally exists around an impurity in the usual ferromagnetic metals at finite temperature due to the local inversion-symmetry breaking by the impurity. The result is potentially relevant to magnetic oxides which the anomalous Hall effect is enhanced at finite temperatures.

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Hiroaki Ishizuka, Naoto Nagaosa. 2018-06-18. Impurity-induced vector spin chirality and anomalous Hall effect in ferromagnetic metals. https://doi.org/10.1088/1367-2630%2Faaf510

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