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Reconstruction of steps on the Cu(111) surface induced by sulfur
Journal of Chemical Physics
  • Holly L. Walen, Iowa State University
  • Da-Jiang Liu, Ames Laboratory
  • Junepyo Oh, RIKEN Surface and Interface Science Laboratory
  • Hyunseob Lim, RIKEN Surface and Interface Science Laboratory
  • James W. Evans, Iowa State University
  • Yousoo Kim, RIKEN Surface and Interface Science Laboratory
  • Patricia A. Thiel, The Ames Laboratory (U.S. Department of Energy) and Iowa State University
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Arich menagerie of structures is identified at 5Kfollowing adsorption of lowcoverages (≤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.

The following article appeared in Journal of Chemical Physics 142, 19 (2015): 194711 and may be found at doi: 10.1063/1.4921258.

Copyright 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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American Institute of Physics
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Holly L. Walen, Da-Jiang Liu, Junepyo Oh, Hyunseob Lim, et al.. "Reconstruction of steps on the Cu(111) surface induced by sulfur" Journal of Chemical Physics Vol. 142 Iss. 19 (2015) p. 194711-1 - 194711-14
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