Hartree-Fock study of the moiré Hubbard model for twisted bilayer transition metal dichalcogenides

The authors use Hartree-Fock methods to provide a comprehensive understanding of the moir\'e Hubbard model, believed to describe the low-energy physics of the twisted bilayer dichalcogenide material WSe₂. They present a comprehensive phase diagram, reveal a previously unnoticed gauge symmetry, demonstrate a region of a reentrant metal-insulator transition, and elucidate the roles of fermiology and commensurability in the transitions. Comparison to experimental data locates the currently studied systems in the intermediate coupling region of the phase diagram.