Vibrational states of surface crystal atoms

Abstract

AbstractThe momenta–time correlation functions and their spectral densities are studied for rare gas crystal atoms at the (100) and (110) surfaces. Their characteristics essentially differ from the bulk behaviour for particles lying in the surface plane, but already in the third subsurface atomic plane the differences from the bulk crystal spectrum are only slight. Distinct quasi‐resonance peaks observed in the spectral densities may be an information source for experimental analysis of the surfaces.