Dynamical vertex approximation for many-electron systems with spontaneously broken SU(2) symmetry

Abstract

While it is commonly assumed that correlation effects in quantum materials get partly mitigated by the onset of magnetic order, the precise role played by strong correlations in spontaneous symmetry-broken phases remains largely unexplored. Here, the authors' generalization of one of the most used diagrammatic extensions of dynamical mean-field theory to treat magnetic ordered phases provides a powerful tool to unveil the spectroscopic signatures of electronic correlations in strongly correlated quantum magnets, as highlighted by preliminary results for testbed cases.

Topics & Concepts