Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 40: Adsorption an Oberfl
ächen IV

O 40.8: Vortrag

Dienstag, 8. März 2005, 12:30–12:45, TU EB202

Coverage-dependent adsorption phases of Cs on Cu(111) — •Thomas von Hofe, Jörg Kröger, and Richard Berndt — Institut für Experimentelle und Angewandte Physik, Universität Kiel, D-24098 Kiel

While the adsorption structure of several alkali metals on noble metal surfaces is well examined, little is known about Cs on Cu(111). We report about atomically resolved STM images of Cs on Cu(111) with coverages 0<Θ≤0.25 ML at 9 K. Depending on coverage, we observe four incommensurate rotated and a commensurate phase similar to Cs on Ag(111). We explain the observed rotation angles of the incommensurate phases with a model by McTague and Novaco [1] which was originally developed to explain adsorption structures of argon on graphite.

[1] J.P. McTague, A.D. Novaco, Phys. Rev. B 19, 5299 (1979)