Identification of surface optical photoemission (div Ā ≠ 0) from silver: The significance of high index faces

摘要: Abstract The spectral and crystallographic dependence of the photoyield Yp for p-polarized light has been measured on a cylindrical silver single crystal. In particular high index faces, effect varying not only polar but also azimuthal angle incidence was used to determine character contributing electron excitation processes. A drastic decrease observed asymmetry towards energies below volume plasma frequency found. experimental features support conclusion that nonlocal excitations are dominant in energy range 3.8 eV.