Abstract
Semiempirical potential energy functions have been utilized for a variety of calculations in the Ga-Al-As system: (1) surface energies have been calculated for several orientations of GaAs; (2) ledge energies for the GaAs(00 1 ) (As terminated) surface show long range interaction effects with the ledge energy increasing with spacing; (3) GaAs(001)/AlAs(001) superlattices have been simulated for a range of interlayer spacings with the excess interfacial energy per interlayer increasing from 5 erg/cm 2 at an interlayer spacing of 1 molecular layer (5.8 Å) to 50 erg/cm 2 at an interlayer spacing of 18 molecular layers (103.8 Å).
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