title: Electronic structure and dynamics of quantum-well states in thin Yb metal films.
abstract: Quantum-well states above the Fermi energy in thin Yb(111) metal films deposited on a W(110) single crystal were studied by low-temperature scanning tunneling spectroscopy. These states are laterally highly localized and give rise to sharp peaks in the tunneling spectra. A quantitative analysis of the spectra yields the bulk-band dispersion in the Gamma-L direction as well as quasiparticle lifetimes. The quadratic energy dependence of the lifetimes is in quantitative agreement with Fermi-liquid theory.
authors.affiliation: Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin-Dahlem, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Wegner
authors.forename: A
authors.initials: A
authors.lastname: Bauer
authors.forename: G
authors.initials: G
authors.lastname: Kaindl