Abstract
We study the temperature dependences of EXAFS Debye-Waller factors for two- and three-dimensional high symmetric crystals based on the previously developed first principle quantum statistical theory, The nearest neighbor interatomic potential is taken into account by use of the anharmonic Morse potential. Availability of Debye and Einstein approximation is investigated for a two- and three-dimensional diatomic model. The harmonic Debye-Waller factors for first and second-shell atoms are calculated, and we find quite similar behaviors to those for one-dimensional crystals.
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