Fig. 1: Crystal structure and band gap of SnTe monolayer.
From: Peculiar band geometry induced giant shift current in ferroelectric SnTe monolayer
a Top view, (b) side view along the x direction and (c) side view along the y direction of the crystal structure of the SnTe monolayer. The unit cell is indicated by the dashed rectangle in a. d The band gap between the lowest conduction band and the highest valence band in the Brillouin zone, where k0, \({\bar{{{{\bf{k}}}}}}_{0}\,{{{{\bf{k}}}}}_{1}\) and \({\bar{{{{\bf{k}}}}}}_{1}\) are the valley points.
