Regensburg 2007 – scientific programme
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O: Fachverband Oberflächenphysik
O 14: Metal Substrates: Epitaxy and Growth
O 14.9: Talk
Monday, March 26, 2007, 16:15–16:30, H39
Quantum-Well Wave-Function Localization and the Electron-Phonon Interaction in Thin Ag Nanofilms — •Stefan Mathias1, Martin Wiesenmayer1, Martin Aeschlimann1, and Michael Bauer2 — 1Department of Physics, University of Kaiserslautern, 67663 Kaiserslautern, Germany — 2Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24098 Kiel, Germany
The electron-phonon interaction in thin Ag nanofilms epitaxially grown on Cu(111) is investigated by temperature-dependent and angle-resolved photoemission from silver quantum-well states. Clear oscillations in the electron-phonon coupling parameter as a function of the silver film thickness are observed [1]. Different from other thin film systems where quantum oscillations are related to the Fermi-level crossing of quantum-well states, we can identify a new mechanism behind these oscillations, based on the wavefunction localization of the quantum-well states in the film.
[1] S.Mathias, M. Wiesenmayer, M. Aeschlimann, M.Bauer, Phys. Rev. Lett. 97, 236809 (2006)