Influence of surface morphology on surface states for Cu on Cu(111)

Abstract

We have exploited angle-resolved one-photon photoemission, two-photon photoemission, and spot-profile analysis of low-energy electron diffraction to monitor the influence of surface morphology on the occupied and empty surface states observed at $\overline{\Gamma }$ on Cu(111). Surface morphology changes were induced by homoepitaxial growth of Cu on Cu(111). A simple model of electron localization on terraces successfully explains energy shifts and linewidth broadening of both surface states. Obviously, surface states may be used as sensitive probes of terrace-width distributions and other structural properties.