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Recent progress in the understanding of RHEED has enabled the interpretation of data from disordered structures. If the correlation length of the disorder is small, the strong forward scattering at high energies corresponds to an averaging over the disorder such that the multiple scattering is mainly determined by the two-dimensional periodic structure part of the surface layers. Hence, this structure...
New 2D periodic structures have been observed by STM in the regions of the reconstructed Pt(100) surface which are confined by domain boundaries or lattice steps. These structures can be seen only in a very narrow energy window near the Fermi level, and they are strongly correlated to the original atomic arrangements of the surface. These structures arise most probably from a modification in the distribution...
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