Abstract
Molecular dynamics calculations have been performed to reanalyze the previously published x-ray diffraction data from Pt(977) [Steadman et al., Phys. Rev. B 64, 125418 (2001)] which exhibited intense oscillations of the diffracted intensities at widely spaced intervals of the perpendicular momentum transfer. The largely improved fit to the data allows one to precisely determine the strain field at the surface region and the magnitude of the elastic dipole density associated with a step, p=1.10 - 9 N, which is at the origin of the strong repulsive step-step interaction.
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