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摘要
We study the anomalous Hall effect due to noncoplanar magnetism on a pyrochlore structure. We focus on the frustration-induced spatial inhomogeneity of different magnetic low-temperature regimes, between which one can efficiently tune using an external magnetic field. We incorporate nonmagnetic scattering on a phenomenological level so that we can distinguish between the effects of short-range correlations and short-range coherence. We obtain a Hall conductivity (sigma(H)) as a function of field strength and direction which compares well to the experimental data of Pr2Ir2O7. In particular, we show that the observed peak in sigma(H) for H parallel to [111] signals the crossover from zero-field spin ice to kagome ice.
- 出版日期2013-7-17
