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A solution of the tight-binding model of resonance diffraction of high-energy electrons from a crystal surface is found which describes the behaviour of the reflectivity in the vicinity of the intersection of a resonance parabola and a horizontal Kikuchi line. A simple analytical formula is obtained which makes it possible to evaluate the wave function for the case where both resonance and potential...
The approximate representation of the atomic potential in the form of a set of Gaussian exponential terms has long been recognized as the most convenient method for carrying out many-beam calculations of reflection high-energy electron diffraction (RHEED) intensities. Smith and Burge and later Doyle and Turner (hereafter referred as DT) used Gaussian fitting to represent the scattering factor of a...
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