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

M. Mayrhofer-Reinhartshuber*, P. Kraus, A. Tamtögl, S. Miret-Artés, W. E. Ernst

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Helium 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.

Originalspracheenglisch
Aufsatznummer205425
FachzeitschriftPhysical Review / B
Jahrgang88
Ausgabenummer20
DOIs
PublikationsstatusVeröffentlicht - 25 Nov 2013

ASJC Scopus subject areas

  • !!Electronic, Optical and Magnetic Materials
  • !!Condensed Matter Physics

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