Abstract
The distribution of domain walls in a reconstructed surface with an arbitrary amount of incommensurability is described by Markovian disorder. The angular distribution of the diffraction intensity is obtained exactly in closed-form in the kinematic approximation. The Bragg peak position and the half width exhibit an unusual characteristic of oscillating and twisting about the reciprocal “rods” in reciprocal space. As a special case of small momentum transfer perpendicular to the surface, this theory successfully describes the recent glancing-incidence X-ray diffraction experiment from a reconstructed Au(110) surface by I.K. Robinson
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