Abstract
Recently determined band-edge hydrostatic deformation potentials are used to predict heterojunction band offsets for the pseudomorphic GaAs-InP system. The calculations include GaAs/InP, InP/GaAs, and strained-layer GaAs-InP superlattices for both [100] and [111] oriented epitaxial growth. The offsets are type II for the unstrained case. The large hydrostatic contributions to the stress-induced band offsets can convert the offsets to type I. This conversion is especially apparent for growth in the [111] direction because of the small Poisson ratio for biaxial stress in the (111) plane.