Electronic band structure of pseudodirect chalcopyrite semiconductors: II. ZnGeP₂ and ZnSiAs₂

Abstract

Abstract The band structures of the chalcopyrite semiconductors ZnGeP 2 and ZnSiA 2 are calculated using the empirical pseudopotential method as applied successfully already to ZnSiP 2 and CdSiP 2 . The band structures are in good agreement with experimental data. The influences of all three tetragonal parts of the crystal potentials (antisymmetric cation potentials, tetragonal compressions, and distortions of the anion sublattices) on the band structures and on optical transition energies are investigated in detail.