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Title: Reconstruction of steps on the Cu(111) surface induced by sulfur

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:
 [1] ;  [2] ; ; ;  [3] ;  [2] ;  [4] ;  [1] ;  [4] ;  [4]
  1. Department of Chemistry, Iowa State University, Ames, Iowa 50011 (United States)
  2. Ames Laboratory of the USDOE, Ames, Iowa 50011 (United States)
  3. RIKEN Surface and Interface Science Laboratory, Wako, Saitama 351-0198 (Japan)
  4. (United States)
Publication Date:
OSTI Identifier:
22415812
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 142; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; ATOMS; CHAINS; COPPER; CRYSTAL STRUCTURE; DENSITY; SULFUR; SULFUR COMPLEXES; SURFACES; TEMPERATURE RANGE 0273-0400 K