Chirality driven anomalous Hall effect in weak coupling regime

Details Chirality driven anomalous Hall effect in weak coupling regime Chirality driven anomalous Hall effect in weak coupling regime

2002-04-04

arxiv.org/abs/cond-mat/0204096v1

J. Phys. Soc. Jpn. 71, 2613-2616 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1143/JPSJ.71.2613

Anomalous Hall effect arising from non-trivial spin configuration (chirality) is studied based on the $s$-$d$ model. Considering a weak coupling case, the interaction is treated perturbatively. Scattering by normal impurities is included. Chirality is shown to drive locally Hall current and leads to overall Hall effect if there is a finite uniform chirality. This contribution is independent of the conventional spin-orbit contribution and shows distinct low temperature behavior. In mesoscopic spin glasses, chirality-induced anomalous Hall effect is expected below the spin-glass transition temperature. Measurement of Hall coefficient would be useful in experimentally confirming the chirality ordering.

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