Note on Temperature Dependence of Debye-Waller Factor in a Unified Model of Ferroelectrics
نویسندگان
چکیده
منابع مشابه
On EXAFS Debye-Waller factor and recent advances.
The effects of structural and vibrational disorder on the EXAFS signals are parameterized in terms of the Debye Waller (DW) factor. Here the vibrational contribution is addressed, which for most systems can be singled out by studying the temperature dependence of the EXAFS DW factor, which corresponds to a good accuracy to the parallel mean square relative displacement (MSRD) around the inter-a...
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We show that the prediction of mode-coupling theory for a model of a network-forming strong glass former correctly describes the wave-vector dependence of the Debye-Waller factor. To obtain a good description it is important to take into account the triplet correlation function c(3), which we evaluate from a computer simulation. Our results support the possibility that this theory is able to de...
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The Debye-Waller factor and the mean-squared displacement from lattice sites for solid He and He were calculated with path-integral Monte Carlo at temperatures between 5 and 35 K, and densities between 38 and 67 nm. It was found that the mean-squared displacement exhibits finite-size scaling consistent with a crossover between the quantum and classical limits of N and N, respectively. The tempe...
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Debye-Waller factors at different t empera tures of four alkali and three noble metals have been computed on the basis of a screened shell phenomenologica l model . T h e theoretical values are compared with existing experimental data . Part icularly for l i th ium and potassium, most recent experimental information has been included. A critical examina t ion of the results reveals a satisfacto...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1987
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.78.177