Title: Correlated mixed-valence insulators in moiré transition metal dichalcogenides

Abstract: Moiré transition metal dichalcogenide (TMD) materials provide an ideal playground for studying the combined interplay of strong interactions and band-topology over a range of electronic fillings. In this talk, I will discuss the panoply of interaction-induced electronic phases that arise at a total commensurate filling of $\nu = 2$ in moiré TMD hetero-bilayers, focusing specifically on their renormalized band-topology. Carrying out a comprehensive self-consistent parton mean-field analysis on an interacting mixed-valence Hamiltonian describing AB-stacked MoTe2/WSe2, I will highlight the different ingredients that arise due to “Mottness”, band-flattening, an enhanced excitonic tendency, and band-inversion, leading to correlated semi-metals and insulators.

Lunch will be provided at 12:30 PM in EQuad J401.