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Quantum-Well Wavefunction Localization and the Electron-Phonon Interaction in Thin Ag Nanofilms

S. Mathias·M. Wiesenmayer·M. Aeschlimann·M. Bauer
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Abstract

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.

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S. Mathias, M. Wiesenmayer, M. Aeschlimann, M. Bauer. 2006-12-07. Quantum-Well Wavefunction Localization and the Electron-Phonon Interaction in Thin Ag Nanofilms. https://doi.org/10.1103/physrevlett.97.236809

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