Electronic density of states and bonding in chalcopyrite-type semiconductors

Measured x-ray-photoemission spectra for ZnGeP₂ and CdSnAs₂ are presented along with density-of-states N (E) and charge-density calculations for ZnGeP₂. Analysis of the density-of-states spectra illustrates the relation between N (E) structure and bonding properties, allowing spectral peaks to be assigned to specific bonds.