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The system K/Au(111): adsorption and surface restructuring

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

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Schuster,  Rolf
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., Schuster, R., Behm, R., & Ertl, G. (1996). The system K/Au(111): adsorption and surface restructuring. Surface Science, 348(3), 280-286. doi:10.1016/0039-6028(95)01027-0.


Cite as: https://hdl.handle.net/21.11116/0000-0009-AC9A-8
Abstract
The interaction of the reconstructed Au(111) surface with adsorbed K atoms was analyzed by scanning tunneling microscopy and low-energy electron diffraction (LEED). For K coverages between ∼ 0.1 and 0.33 monolayers (ML) the periodicity of the Au(111) Chevron reconstruction decreases with coverage. The K adatoms form a hexagonal (√3 × √3)R30° overlayer on the reconstructed substrate at θK ≈ 0.33 ML. For higher K coverages islands of a K-induced reconstruction are formed. The Au(111) reconstruction is completely lifted at ∼ 0.5 ML K, whereby a (2 × 2) LEED pattern is observed.