Polarization Dependence of Angular-Resolved Photoemission from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi></mml:math>Bands of Cu

Abstract

We find strong polarization effects in the angular-resolved energy distribution of photoelectrons emitted from a Cu(111) surface using plane polarized light at normal incidence with $\ensuremath{\omega}=10.2$ eV. This polarization dependence reveals the symmetry and $\stackrel{\ensuremath{\rightarrow}}{\mathrm{k}}$ vector of the states involved, in particular for excitation from $d$ states. The spectra can be interpreted assuming direct transitions between bulk states and subsequent elastic emission. No evidence for many-body effects or modification of the states at the surface is observed.