title: Reconstruction of steps on the Cu(111) surface induced by sulfur.
abstract: A rich menagerie of structures is identified at 5 K following adsorption of low coverages (≤0.05 monolayers) of S on Cu(111) at room temperature. This paper emphasizes the reconstructions at the steps. The A-type close-packed step has 1 row of S atoms along its lower edge, where S atoms occupy alternating pseudo-fourfold-hollow (p4fh) sites. Additionally, there are 2 rows of S atoms of equal density on the upper edge, bridging a row of extra Cu atoms, together creating an extended chain. The B-type close-packed step exhibits an even more complex reconstruction, in which triangle-shaped groups of Cu atoms shift out of their original sites and form a base for S adsorption at (mostly) 4fh sites. We propose a mechanism by which these triangles could generate Cu-S complexes and short chains like those observed on the terraces.
authors.affiliation: Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: Holly
authors.initials: H
authors.lastname: Walen
authors.affiliation: Ames Laboratory of the USDOE, Ames, Iowa 50011, USA.
authors.forename: Da-Jiang
authors.initials: DJ
authors.lastname: Liu
authors.affiliation: RIKEN Surface and Interface Science Laboratory, Wako, Saitama 351-0198, Japan.
authors.forename: Junepyo
authors.initials: J
authors.lastname: Oh
authors.affiliation: RIKEN Surface and Interface Science Laboratory, Wako, Saitama 351-0198, Japan.
authors.forename: Hyunseob
authors.initials: H
authors.lastname: Lim
authors.affiliation: Ames Laboratory of the USDOE, Ames, Iowa 50011, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Evans
authors.affiliation: RIKEN Surface and Interface Science Laboratory, Wako, Saitama 351-0198, Japan.
authors.forename: Yousoo
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: P A
authors.initials: PA
authors.lastname: Thiel