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Helium-surface interaction potential of Sb(111) from scattering experiments and close-coupling calculations

AuthorsMayrhofer-Reinhartshuber, M.; Kraus, P.; Tamtögl, A.; Miret-Artés, Salvador ; Ernst, W.E.
Keywords[PACS] Atom scattering from surfaces (diffraction and energy transfer)
[PACS] Adsorption kinetics
[PACS] Scattering of atoms and molecules
[PACS] Interactions of atoms and molecules with surfaces
Issue Date2013
PublisherAmerican Institute of Physics
CitationPhysical Review B - Condensed Matter and Materials Physics 88: 205425 (2013)
AbstractHelium atom scattering (HAS) was used to study the antimony Sb(111) surface beyond the hard-wall model. HAS angular distributions and drift spectra show a number of selective adsorption resonance features, which correspond to five bound-state energies for He atoms trapped in the surface-averaged He-Sb(111) potential. As their best representation, a 9-3 potential with a depth of 4.4±0.1 meV was determined. Furthermore, the charge density corrugation of the surface was analyzed using close-coupling calculations. By using a hybrid potential, consisting of a corrugated Morse potential (short range) and a 9-3 potential (long range), a peak-to-peak corrugation of 17% was obtained. The kinematic focusing effects that occurred were in good agreement with surface phonon dispersion curves from already published density functional perturbation theory calculations. © 2013 American Physical Society.
Identifiersdoi: 10.1103/PhysRevB.88.205425
issn: 1098-0121
Appears in Collections:(CFMAC-IFF) Artículos
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