Quantum-Well Wavefunction Localization and the Electron-Phonon   Interaction in Thin Ag Nanofilms
  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. 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. 
S. Mathias, M. Wiesenmayer, M. Aeschlimann, M. Bauer