BAND-STRUCTURE AND OPTICAL-PROPERTIES OF CUBR - NEW PHOTOEMISSION RESULTS

We have measured angle-resolved ultraviolet photoemission spectra from epitaxially grown thin films of CuBr with (111) orientation. Their an alysis allows the determination of an experimental valence band disper sion very near the GAMMA-L-direction of the bulk Brillouin zone. These results show fair agreement with a KKR band structure calculation per formed by Overhof. Our results, combined with earlier results obtained by 'constant-initial-state' photoelectron spectroscopy, are in agreem ent with all available optical data to within typically +/-0.1 eV.