Formation of surface ternary alloys by coadsorption of alkali metals on Al(111)

S.V. Christensen, J. Nerlov, K. Nielsen, J. Burchhardt, Martin Meedom Nielsen, D.L. Adams

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Coadsorption of one-quarter monolayer Na with one-quarter monolayer K, Rb, or Cs on Al(111) at 300 K is shown to result in the formation of surface ternary alloys with (2 X 2) unit cells. Chemical shifts in core electron binding energies and quantitative analyses by low energy electron diffraction indicate that the first four surface layers consist in each case of an X-Al-Na sandwich (X = K, Rb, or Cs) on a reconstructed Al substrate layer. The lower layer of the sandwich always contains Na, irrespective of the adsorption sequence.
Original languageEnglish
JournalPhysical Review Letters
Volume76
Issue number11
Pages (from-to)1892-1895
ISSN0031-9007
DOIs
Publication statusPublished - 1996
Externally publishedYes

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