Mesoscopic structural transformations of the Au(111) surface induced by alkali 
metal adsorption

Barth, Johannes V.; Behm, R. J.; Ertl, Gerhard

doi:10.1016/0039-6028(94)90828-1

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Mesoscopic structural transformations of the Au(111) surface induced by alkali metal adsorption

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Barth, Johannes V.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Behm, R. J.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl, Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Barth, J. V., Behm, R. J., & Ertl, G. (1994). Mesoscopic structural transformations of the Au(111) surface induced by alkali metal adsorption. Surface Science, 302(3), L319-L324. doi:10.1016/0039-6028(94)90828-1.

Cite as: https://hdl.handle.net/21.11116/0000-0009-98D6-A

Abstract

The response of the Au(111) surface reconstruction on the adsorption of Na and K atoms was studied by means of scanning tunneling microscopy. With increasing coverage the periodicity of the chevron structure decreases continuously from about 250 to 100 Å. For Na coverages exceeding θ ≈ 0.20 the stacking fault lines become distorted and eventually a poorly ordered domain structure with hexagonal symmetry and even higher density of Au atoms is formed at θ ≈ 0.23. These effects are attributed to an adsorbate-induced weakening of the coupling between the first two Au layers by which the influence of the elastic stress within the topmost layer becomes more dominant.