Surface states in crystals with low-index surfaces*
Wang Hui-Pinga), Tao Rui-Baoa),b)
       
(a) The schematic illustration of the lattice structure of a semi-infinite 2D crystal and (b)–(d) the dispersion relation of edge states obtained by means of the exact diagonalization method (blue line) and TMM (red dash-line). (b) and . (c) , and t 3 = 0.0. (d) , t 2 = 0.0 and . For all results we use and .