ANGULAR-DEPENDENT ULTRAVIOLET PHOTOEMISSION SPECTROSCOPY OF POLYCRYSTALLINE FILMS - PROBE OF SURFACE ELECTRONIC-STRUCTURE

Angle-resolved ultraviolet photoemission (ARUPS) studies of polycrystalline noble metal are reported. In polycrystalline films, the electron exit angle with respect to the crystalline axes is averaged over, thus variation of the electron polar (exit) angle should result in variation of surface sensitivity. This work represents the first application of ARUPS with low-exit-angle geometries for the investigation of surface electronic structure. The main results are that Cu exhibits considerable ( similar 17%) d-band narrowing at the bottom of the d-band at the surface, while the effects in Ag and Au appear to be much smaller.