%0 Journal Article
%T Optical gyrotropy in quadrupolar Kondo systems
%A SungBin Lee
%A Arun Paramekanti
%A Yong Baek Kim
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevB.91.041104
%X Recent experiments point to a variety of intermetallic systems which exhibit exotic quadrupolar orders driven by the Kondo coupling between conduction electrons and localized quadrupolar degrees of freedom. Using a Luttinger k.p Hamiltonian for the conduction electrons, we study the impact of such quadrupolar order on their energies and wave functions. We discover that such quadrupolar orders can induce a nontrivial Berry curvature for the conduction electron bands, leading to a nonvanishing optical gyrotropic effect. We estimate the magnitude of the gyrotropic response in a candidate quadrupolar material, PrPb3, and discuss the resulting Faraday rotation in thin films.
%U http://arxiv.org/abs/1408.2830v1