Nonlocal pseudopotentials for Ge and GaAs

Abstract
Nonlocal pseudopotentials are constructed for Ge and GaAs. Agreement with interband optical edges in the region 0-7 eV is achieved to within 0.05 eV. The by-products of the calculation are: an improved fit to valence-band edges as measured by photoemission; an improved critical-point topology for the energy difference between the lowest conduction and highest valence bands; and more significant local-pseudopotential parameters.