Structure of Al(111)-(2x2)-Rb

D.L. Adams, Martin Meedom Nielsen, J. Burchhardt, J.N. Andersen

Research output: Contribution to journalJournal articleResearchpeer-review


The atomic geometry of the Al(111)-(2 x 2)-Rb phase formed by adsorption of one-quarter monolayer Rb on Al(111) at 100 K has been determined by analysis of low-energy electron diffraction measurements. The adsorbed Rb atoms are found to occupy on-top sites an a rumpled first layer of Al atoms, as in the corresponding (root 3 x root 3)R30 degrees phases formed by adsorption of one-third monolayer K, Rb, and Cs on Al(111) at low temperature. However, the adsorbed Rb atoms in the (2 x 2) phase have anomoiously large thermal vibrations.
Original languageEnglish
JournalPhysical Review B
Issue number15
Pages (from-to)11078-11083
Publication statusPublished - 1999
Externally publishedYes

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