title: Role of elastic scattering in electron dynamics at ordered alkali overlayers on Cu(111).
abstract: Scanning tunneling spectroscopy of p(2 x 2) Cs and Na ordered overlayers on Cu(111) reveals similar line widths of quasi-two-dimensional quantum well states despite largely different binding energies. Detailed calculations show that 50% of the line widths are due to electron-phonon scattering while inelastic electron-electron scattering is negligible. The mechanism of enhanced elastic scattering due to Brillouin zone backfolding contributes the remaining width.
authors.affiliation: Donostia International Physics Center, Paseo Manuel de Lardizabal 4, San Sebastian 20018, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Corriol
authors.forename: V M
authors.initials: VM
authors.lastname: Silkin
authors.forename: D
authors.initials: D
authors.lastname: Sánchez-Portal
authors.forename: A
authors.initials: A
authors.lastname: Arnau
authors.forename: E V
authors.initials: EV
authors.lastname: Chulkov
authors.forename: P M
authors.initials: PM
authors.lastname: Echenique
authors.forename: T
authors.initials: T
authors.lastname: von Hofe
authors.forename: J
authors.initials: J
authors.lastname: Kliewer
authors.forename: J
authors.initials: J
authors.lastname: Kröger
authors.forename: R
authors.initials: R
authors.lastname: Berndt