Two-dimensional condensation of potassium on Ag(001)

S. Modesti, C.T. Chen, Y. Ma, G. Meigs, P. Rudolf, F. Sette

Research output: Contribution to journalArticleAcademic

48 Citations (Scopus)
248 Downloads (Pure)


Temperature- and coverage-dependent soft-x-ray photoemission and photoabsorption studies on potassium-covered Ag(001) surfaces demonstrate the formation of potassium two-dimensional compressed islands, even at coverages far below saturation. The expected disperse-overlayer structure is metastable, and is irreversibly transformed into the compressed phase at higher temperature. These results indicate that the short-range attractive adsorbate-adsorbate interaction overcomes the electrostatic repulsion and the surface-corrugation potential, and that the adsorbate-substrate charge transfer is insignificant, supporting recent theoretical studies.
Original languageEnglish
Number of pages4
JournalPhysical Review B
Issue number8
Publication statusPublished - 1990

Cite this