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

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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

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Helium
surface reactions
helium
Scattering
helium atoms
scattering
Atoms
Experiments
Morse potential
Antimony
Angular distribution
Charge density
antimony
Electron energy levels
Kinematics
kinematics
angular distribution
perturbation theory
Adsorption
adsorption

ASJC Scopus subject areas

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

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Helium-surface interaction potential of Sb(111) from scattering experiments and close-coupling calculations. / Mayrhofer-Reinhartshuber, M.; Kraus, P.; Tamtögl, A.; Miret-Artés, S.; Ernst, W. E.

in: Physical Review / B, Jahrgang 88, Nr. 20, 205425, 25.11.2013.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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AU - Miret-Artés, S.

AU - Ernst, W. E.

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