Abstract

A new direct structural analysis method, which is based on the vibrational correlation between the nearest neighbor atoms in crystal, is presented. A very simple oscillation has been observed in the three-dimensional data-set of electron thermal diffuse scattering in a low-to-medium energy range from a Si(001) 2×1 surface. The observed oscillation has been attributed to the coherent diffraction among the nearest neighbor atoms, in which the vibrational correlation is very large. We demonstrate that nearest neighbor pairs of Si(001) 2×1 dimer structure are directly reconstructed by using the Patterson analysis of the observed patterns. The present method is a promising new tool for determining surface structures.

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