title: Experimental and theoretical investigation of single Cu, Ag, and Au atoms adsorbed on Si(111)-(7x7).
abstract: Using scanning tunneling microscopy and first principles calculations, the adsorption sites of single Cu, Ag, and Au atoms on the Si(111)-(7x7) surface have been systematically investigated and identified. Despite their monovalence, these atoms were found to adsorb at high coordination sites, seeking to saturate the maximum number of dangling bonds. The stable adsorption sites were further observed to be distinctly different in the faulted and unfaulted half unit cells, showing an asymmetry that has never been observed for many other adsorbates.
authors.affiliation: Department of Physics and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Hong Kong, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Zhang
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Kedong
authors.initials: K
authors.lastname: Wang
authors.forename: Hongwei
authors.initials: H
authors.lastname: Yang
authors.forename: Tao
authors.initials: T
authors.lastname: Su
authors.forename: C T
authors.initials: CT
authors.lastname: Chan
authors.forename: M M T
authors.initials: MM
authors.lastname: Loy
authors.forename: Xudong
authors.initials: X
authors.lastname: Xiao