Figure 2: Electronic structures and band-gap evolution of SnTe and PbTe.
From: Topological crystalline insulators in the SnTe material class
The electronic band structures of SnTe and PbTe are shown in (a) and (b), respectively. The size of the red dots represents the fraction of electronic charge residing on Te atoms. The exchange of the band character at L point as highlighted in the grey area indicates the intrinsic band inversion of SnTe. The band-gap energy as a function of the lattice constants is shown in (c). The negative gap area indicates the topological crystalline insulator phase.
