Twisted Janus TMDs as moiré quantum simulators

We investigate the moiré bandstructure of twisted polar transition metal dichalcogenides bilayers (Janus TMDs). These systems exhibit a set of extremely narrow bands over a broad range of twist angles. The dispersion is computed using a continuum model instructed by ab-initio calculations and accounts for lattice relaxation, spin-orbit coupling (SOC), and effective mass variations on the moiré scale. In homobilayers, the moirè pattern localizes holes/electrons in triangular, honeycomb, and Kagomè lattices while in heterobilayers Rashba SOC generates non-trivial spin textures.