Surface-atom valence-band photoemission from Au(111) and Au(100)-(5 × 20)

We observe surface-resonance features at nearly equal initial state energies in photoelectron spectra taken at normal exit from reconstructed Au(111) and Au(100) surfaces. We propose a common origin in the outermost compressed and corrugated atomic layers. We demonstrate that our interpretation is fully consistent with experimental observations of several other authors.