The dynamical structure factor in topologically disordered systems

Details The dynamical structure factor in topologically disordered systems The dynamical structure factor in topologically disordered systems

2000-08-31

arxiv.org/abs/cond-mat/0008472v2

J. Chem. Phys., 114 (2001) 8068

Physics

Condensed Matter

Disordered Systems and Neural Networks

Version to be published in J. Chem. Phys

Scientific paper

10.1063/1.1349709

A computation of the dynamical structure factor of topologically disordered systems, where the disorder can be described in terms of euclidean random matrices, is presented. Among others, structural glasses and supercooled liquids belong to that class of systems. The computation describes their relevant spectral features in the region of the high frequency sound. The analytical results are tested with numerical simulations and are found to be in very good agreement with them. Our results may explain the findings of inelastic X-ray scattering experiments in various glassy systems.

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