Adsorption geometry of Cu(111)-Cs studied by scanning tunneling microscopy

Abstract

Using scanning tunneling microscopy at low temperatures we investigated the adsorbate system Cu(111)-Cs for various cesium coverages. At low coverages we observe a hexagonally ordered Cs adsorption layer with a mutual adsorbate distance of 1.1 nm. This distance is discussed in terms of a commensurate adsorption superstructure which is stabilized by long-range adsorbate interactions mediated by Cu(111) surface state electrons. Intermediate coverages are characterized by incommensurate superstructures which are rotated with respect to the substrate lattice. The rotation behavior at 9K follows a general trend which is consistent with models of epitaxial rotation. With increasing coverage the adsorption layers are found to rotate toward alignment with the substrate.

arXiv comment8 pages, 4 figures

References in corpus (1)

• Role of elastic scattering in electron dynamics at ordered alkali overlayers on Cu(111)

Cited by in corpus (5)

• Scanning tunneling microscopy and kinetic Monte Carlo investigation of Cesium superlattices on Ag(111)
• Evolution of unoccupied resonance during the synthesis of a silver dimer on Ag(111)
• The ambivalent competition of Coulomb and van-der-Waals interactions in Xe-Cs+ aggregates on Cu(111) surfaces
• Interplay of electronic structure and atomic ordering on surfaces: Momentum-resolved measurements of Cs atoms adsorbed on a Ag(111) substrate
• Hydration at highly crowded interfaces