Surface dynamics of AlSb(110) and GaP(110)

Abstract

We have investigated the lattice dynamics of the (110) surface of AlSb and GaP by employing the adiabatic bond-charge model and using the atomic geometry obtained from ab initio pseudopotential calculations. The results for both surfaces are in very good overall agreement with a recent high-resolution electron-energy-loss spectroscopy experiment and an ab initio calculation. The differences between the dynamical properties of these surfaces are correlated to the cation/anion mass ratios. (C) 1999 Elsevier Science B.V. Ail rights reserved.