Journalartikel

Jahr der Veröffentlichung: 1995

Seiten: 198-204

Zeitschrift: Surface Science

Bandnummer: 337

Heftnummer: 3

ISSN: 0039-6028

DOI Link: https://doi.org/10.1016/0039-6028(95)00617-6

Verlag: Elsevier

Abstract: 

The geometry of the (root 3 X root 3)R30 degrees Li/Ru(0001) phase at a coverage of 0.33 was investigated using low-energy electron diffraction. The analysis revealed that Li atoms reside in the threefold hcp sites as also found with the other alkali metal (root 3 X root 3)R30 degrees phases on Ru(0001). The effective radius of Li turned out to be 1.39 Angstrom close to the covalent Pauling radius. The adsorption of lithium induces a small rumpling of the second Ru layer which has not been observed for the other alkali metal/Ru(0001)-(root 3 X root 3)R30 degrees surfaces. Structural results of the alkali metal/Ru(0001) systems are compared with those of other surfaces. It turns out that at low adsorption temperatures? the occupation of on-top sites is favored for adsorption of bigger alkali metal atoms on close-packed surfaces of ''soft'' metals undergoing local reconstruction.

Harvard-Zitierstil: Gierer, M., Over, H., Bludau, H. and Ertl, G. (1995) Structural properties of ordered alkali metal overlayers: a LEED analysis of the Ru(0001)−(√3 × √3) R30°-Li phase in comparison with related systems, Surface Science, 337(3), pp. 198-204. https://doi.org/10.1016/0039-6028(95)00617-6

APA-Zitierstil: Gierer, M., Over, H., Bludau, H., & Ertl, G. (1995). Structural properties of ordered alkali metal overlayers: a LEED analysis of the Ru(0001)−(√3 × √3) R30°-Li phase in comparison with related systems. Surface Science. 337(3), 198-204. https://doi.org/10.1016/0039-6028(95)00617-6