Lattice Dynamics of Rare Gas Multilayers on the Ag(111) Surface. Theory and Experiment.
Interim technical rept.,
CHICAGO UNIV IL JAMES FRANCK INST
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We discuss the lattice dynamics of argon, krypton and xenon overlayers on the Ag111 surface. We consider monolayer, bilayer, trilayer, and twenty-five layer films of each of these adsorbates. Data are also presented on the dispersion relation of selected branches of the phonon spectra of these overlayers. The data have been obtained by the method of angle-resolved inelastic He scattering. Several models of the lattice dynamics are compared with the data. It is concluded that the gas phase potentials proposed by Barker and co-workers prove suitable for a description of lateral interactions between the adsorbates, within the accuracy of the available data, provided that the phonon spectra are calculate for a lattice with the experimentally determined lattice constants. Originator supplied keywords include Surface dynamics Surfaced phonon spectroscopy Phonon dispersion relations Rare gas interaction potentials Thin film dynamics Inelastic single phonon scattering Gas-surface energy exchange.
- Atomic and Molecular Physics and Spectroscopy