Anomalous Hall effect in heavy electron materials

TL;DR

This paper introduces a new empirical formula for the anomalous Hall effect in heavy electron materials, combining previous theories and accounting for different scattering mechanisms, validated through experimental data across various compounds.

Contribution

It presents a novel empirical formula that unifies existing theories and accurately describes the Hall effect in heavy electron materials over a wide temperature range.

Findings

The new formula fits experimental data well across multiple compounds.

It captures the temperature evolution of the Hall coefficient.

The approach integrates incoherent and coherent skew scatterings.

Abstract

We propose a new empirical formula for the anomalous Hall effect in heavy electron materials based on a phenomenological two-fluid description of the f-electron states. The new formula incorporates two previous theories proposed by Fert and Levy in 1987 and Kontani et al. in the early 1990s and takes into account both incoherent and coherent skew scatterings from local and itinerant f-electrons. We perform experimental analysis in several heavy electron compounds and show that the new formula provides a consistent description of the evolution of the Hall coefficient in the whole temperature range down to only a few Kelvin.