The charge dynamics of a non-centrosymmetric magnetic Weyl semimetal

In work published in npj Quantum Materials, a team led by Prof. Leonardo Degiorgi in the Department of Physics at ETH Zurich has studied the broadband charge dynamics (i.e., longitudinal optical conductivity) of the ferromagnetic (FM), non-centrosymmmetric PrAlGe material. They reveal its electronic environment, based on correlated Weyl states, which favors an unusually large anomalous Hall conductivity (AHC) at low temperatures. The researchers thus propose a suitable experimental approach to trace the relevant ingredients of the electronic structure deploying substantial Berry curvatures, indispensable for AHC.