title: Electron-plasmon and electron-electron interactions at a single atom contact.
abstract: The transition from tunneling to contact is investigated by detecting light emitted from Au(111) in a scanning tunneling microscope. Optical spectra reflect single and multielectron processes and their distinct evolutions as a single-atom contact is formed. The experimental data are analyzed in terms of plasmon excitation and hot-hole processes.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Schull
authors.forename: Nicolas
authors.initials: N
authors.lastname: Néel
authors.forename: Peter
authors.initials: P
authors.lastname: Johansson
authors.forename: Richard
authors.initials: R
authors.lastname: Berndt