Figure 2
From: Superconductivity in In-doped AgSnBiTe3 with possible band inversion

Electronic structure for SnTe with various lattice constants. (a–d) Calculated band structure. Contribution of Sn-p orbitals is represented by the size of pink-circle symbol. According to the calculations, a band inversion occurs with lattice constants smaller than 6.35 Å as plotted in (e). Experimental data in Ref.23 is plotted. Gap energy was calculated from the lowest energy of the Sn-p orbital and the highest energy of the Te-p orbital at the L point.