Inelastic scattering of helium atoms from the phonons of the reconstructed Au(111) surface

We present inelastic atom-surface phonon scattering time-of-flight spectra for the reconstructed Au(111) surface. The shapes of the spectra are compared with calculated reflection coefficients based on a simplified lattice dynamical model for the reconstructed surface. The force constants were deter...

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Veröffentlicht in:Surface science 1987-04, Vol.183 (1), p.180-188
Hauptverfasser: Santoro, G., Franchini, A., Bortolani, V., Harten, U., Toennies, J.P., Wöll, Ch
Format: Artikel
Sprache:eng
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Zusammenfassung:We present inelastic atom-surface phonon scattering time-of-flight spectra for the reconstructed Au(111) surface. The shapes of the spectra are compared with calculated reflection coefficients based on a simplified lattice dynamical model for the reconstructed surface. The force constants were determined from a best fit of the surface phonon dispersion curves and the lateral atom-atom interactions in the surface layer were found to be 30% of the bulk value. The theoretical spectra reproduce the overall lineshape of the experimental spectra and reveal additional features which can be attributed to the reconstruction of the surface layer with respect to the substrate.
ISSN:0039-6028
1879-2758
DOI:10.1016/S0039-6028(87)80343-6