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

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number205425
JournalPhysical Review / B
Volume88
Issue number20
DOIs
Publication statusPublished - 25 Nov 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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