Angle-resolved photoemission studies of the CdS band structure

Publisher Website
Google Scholar
Abstract
We have investigated the valence band structure of wurtzite CdS using synchrotron radiation in the 7–35-eV range. This is the first such study for a II-VI compound. We find that direct transitions largely determine the shape of the experimental spectra. Information from all high-symmetry points in the Brillouin zone is available from normal- and off-normal-emission spectra. Polarization selection rules aid the interpretation of our results. A comparison with our experimentally determined critical-point energies shows that existing theoretical band structure calculations for wurtzite CdS are qualitatively correct, but underestimate the extent of the band dispersion. For instance, we observe an upper valence-band width of 4.5 eV which is significantly larger than the predicted values, 3.0–3.3 eV.

This publication has 0 references indexed in Scilit: