Quantum-well wave-function 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 wave-function localization of the quantum-well states in the film.
Mathias
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Department of Physics, University of Kaiserslautern, 67663 Kaiserslautern, Germany.
Wiesenmayer
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Aeschlimann
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M
Bauer
M
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