Flat band physics in the charge-density wave state of $1T$-TaS${}_2$

Amir Dalal, Jonathan Ruhman, Jörn W. F. Venderbos

1$T$-TaS${}_2$ is the only insulating transition-metal dichalcogenide (TMD) with an odd number of electrons per unit cell. This insulating state is non-magnetic, making it a potentia…