Band structure and optical properties of CuBr: new photoemission results

The authors have measured angle-resolved ultraviolet photoemission spectra from epitaxially grown thin films of CuBr with (111) orientation. Their analysis allows the determination of an experimental valence band dispersion very near Gamma -L-direction of the bulk Brillouin zone. These results show fair agreement with a KKR band structure calculation performed by Overhof. The authors' results, combined with earlier results obtained by 'constant-initial-state' photoelectron spectroscopy, are in agreement with all available optical data to within typically +or-0.1 eV.