We performed Density Functional Theory (DFT) calculations using the Vienna ab initio simulation package (VASP). We used the projector augmented wave (PAW) method and the Perdew-Burke-Ernzerhof (PBE) functional 42 in all calculations. Spin-orbit interactions were included in all calculations. An energy cutoff of 500 eV was used in all calculations. The irreducible representations of each eigenstate at the L-point in rocksalt compounds (Figures ) and the Γ-point in tetradymite compounds (Figures ) are determined using the irvsp software and reported using the notation of Koster et al.