Tunable giant anomalous Hall effect in the Kondo-lattice ferromagnet UBiTe

Kondo-lattice systems are recognized for potentially hosting a variety of rich topological phases. Several pioneering studies have demonstrated significant anomalous Hall and anomalous Nernst effects in these systems, attributed to the Berry curvature of the hybridization bands. In this paper, we investigate UBiTe, a ferromagnetic Kondo-lattice system. Our findings reveal that the intrinsic contribution to the anomalous Hall conductivity is closely tied to the Kondo coherence temperature. Moreover, we demonstrate that slight shifts in the Fermi level across three different samples significantly influence this intrinsic contribution, aligning with the Berry curvature localized within the narrow hybridization bands. This provides a stark contrast to the less pronounced sensitivity observed in weakly correlated Weyl semimetals, underscoring the distinctive electronic properties of Kondo-lattice systems. The anomalous Hall conductivity of one sample ranks among the highest reported for topological magnetic materials.