Figure 3
From: Trigonal multivalent polonium monolayers with intrinsic quantum spin Hall effects
(a) Direct band gaps at Γ point and topological phases versus the SOC magnitude. The ‘NI’ and ‘QSHI’ mean the normal and QSH insulators, respectively. (b) Schematic plot of a bitriangular lattice with PoA \(p_{z}\) and PoB \(p_{x,y}\) orbitals. (c) Band structures from the TB model based on the bitriangular lattice with \(\lambda\) = 0.0, 0.5, and 1.0 eV.
