Abstract
A calculation has been made for surface phonons at the (001) surface of some fcc and bcc transition metals. A model consisting of first and second neighbor central interactions together with angle bending forces is used. The general harmonic approximation is used. A least mean square fit of the bulk phonon spectrum determines the parameters characterizing the interactions. Specific results have been obtained for surface phonons of Pt, Pd, Cu and Ag as well as Fe and W. The effect of varying the force constant near the surface is also reported showing the possibility for the existence of soft surface modes which may account for superstructures.
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