Signatures of Weyl-Kondo physics in Ce3Bi4Pd3

Abstract

Weyl-Kondo semimetals represent a novel category of materials, wherein the interplay of strong correlations and metallic topology leads to the integration of Weyl nodes into the Kondo resonance, thereby substantially amplifying Berry curvature effects. A hallmark of this state, as exemplified by the prototypical Weyl-Kondo semimetal Ce3Bi4Pd3, is a giant spontaneous nonlinear Hall effect. A comparison with noninteracting Weyl semimetals of similar charge carrier concentration reveals that the nonlinear Hall effect is amplified by orders of magnitude through strong correlations. These findings, along with recently discovered new signatures of Weyl-Kondo physics, serve as effective tools for both identifying and utilizing this novel and promising materials class.