Journal Article

PreJuSER-43042

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effects on next-nearest-neighbor interactions on the orientation dependence of step stiffness: Reconciling theory with experiment for Cu(001)

Stasevich, T. J. ; Einstein, T. L. ; Zia, R. K. P. ; Giesen, M.FZJ* ; Ibach, H.FZJ* ; Szalma, F.

2004
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/2175  http://hdl.handle.net/2128/2164  doi:10.1103/PhysRevB.70.245404

Abstract: Within the solid-on-solid (SOS) approximation, we carry out a calculation of the orientational dependence of the step stiffness on a square lattice with nearest- and next-nearest-neighbor interactions. At low temperature our result reduces to a simple, transparent expression. The effect of the strongest trio (three-site, nonpairwise) interaction can easily be incorporated by modifying the interpretation of the two pairwise energies. The work is motivated by a calculation based on nearest neighbors that underestimates the stiffness by a factor of 4 in directions away from close-packed directions, and a subsequent estimate of the stiffness in the two high-symmetry directions alone that suggested that inclusion of next-nearest-neighbor attractions could fully explain the discrepancy. As in these earlier papers, the discussion focuses on Cu(001).

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut für Grenzflächen und Vakuumtechnologien (ISG-3)
2. Institut für biologisch-anorganische Grenzflächen (ISG-4)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2004
Notes: This version is available at the following Publisher URL: http://prb.aps.org

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