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arXiv · 2110.09486

Revealing an anisotropic electronic scattering rate in the "non-metallic" metal FeCrAs using the Hall effect

Ben Lau·Wenlong Wu·Stephen R. Julian
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Abstract

We probe the relationship between magnetism and "non-metallic" transport in the magnetically frustrated metal FeCrAs using the low-field Hall effect. We find that the low-field Hall coefficient is dependent on crystal orientation, and exhibits two temperature-induced sign reversals when the current is within the $ab$-plane. We suggest that these observations are due to scattering from magnetic fluctuations that become momentum-dependent near the onset of long-range magnetic order. It seems, however, that this additional spin-fluctuation scattering rides on top of the non-metallic resistivity, and Hund's metal interorbital correlations remain a possible source of the non-metallic behaviour.

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Ben Lau, Wenlong Wu, Stephen R. Julian. 2021-10-18. Revealing an anisotropic electronic scattering rate in the "non-metallic" metal FeCrAs using the Hall effect. https://arxiv.org/abs/2110.09486

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