Concealed Mott criticality: Unifying the Kondo breakdown and doped charge-transfer insulators

Abstract

I show that the quantum critical points observed in heavy fermions (the ‘Kondo breakdown’) and in doped cuprates can be understood in terms of concealed Mott criticality. In this picture, one species of electrons undergoes a Mott localization transition, in the presence of metallic charge carries. As is shown in a simple toy model, this results in a Fermi surface jump at the transition, as well as mass enhancement on both the ‘large’ and ‘small’ Fermi surface side of the transition, consistent with the experimental observations.