Interaction of Li+ with a Au(1 0 0) surface

Hicham Hamoudi, Céline Dablemont, Vladimir A. Esaulov

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Results of a study of Li+ neutralisation on Au(1 0 0) are presented and compared with an earlier study of neutralisation on Au(1 1 1), where anomalously high neutralisation had been tentatively related to the existence of the L-bandgap and occupied surface state. Neutralisation probability on Au(1 0 0) has a similar magnitude to that on Au(1 1 1) and a similar incident energy dependence, though the electronic structure is different. These results for surfaces with high workfunctions are very unexpected, since significantly smaller values may be expected in a "traditional" picture of a Li+ ion departing from the surface. We can account for the relatively large value of the neutral fraction by considering that the Li(2s) level lies below the Fermi level at short atom-surface separations as this has been shown to be the case for the Cu surface by Goldberg et al. This allows electron capture at small distances and the surviving neutrals account well for the behaviour of the neutral fraction at energies above 500 eV but not at lower energies. This could be due to various reasons including intermediate Li- formation and non-adiabatic effects.

Original languageEnglish
Pages (from-to)2486-2490
Number of pages5
JournalSurface Science
Volume602
Issue number14
DOIs
Publication statusPublished - 15 Jul 2008
Externally publishedYes

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interactions
Surface states
Fermi level
Electronic structure
Energy gap
electron capture
Ions
energy
Atoms
Electrons
electronic structure
atoms
ions

Keywords

  • Alkali metals
  • Atom-solid interactions
  • Electron transfer
  • Electron tunnelling
  • Ion-solid interactions
  • Surface electronic phenomena

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Interaction of Li+ with a Au(1 0 0) surface. / Hamoudi, Hicham; Dablemont, Céline; Esaulov, Vladimir A.

In: Surface Science, Vol. 602, No. 14, 15.07.2008, p. 2486-2490.

Research output: Contribution to journalArticle

Hamoudi, H, Dablemont, C & Esaulov, VA 2008, 'Interaction of Li+ with a Au(1 0 0) surface', Surface Science, vol. 602, no. 14, pp. 2486-2490. https://doi.org/10.1016/j.susc.2008.05.037
Hamoudi, Hicham ; Dablemont, Céline ; Esaulov, Vladimir A. / Interaction of Li+ with a Au(1 0 0) surface. In: Surface Science. 2008 ; Vol. 602, No. 14. pp. 2486-2490.
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