Vibrational spectra in glasses
arXiv:cond-mat/0104433 · doi:10.1080/13642810110084588
Abstract
The findings of X-ray and neutron scattering experiments on amorphous systems are interpreted within the framework of the theory of Euclidean random matrices. This allows to take into account the topological nature of the disorder, a key ingredient which strongly affects the vibrational spectra of those systems. We present a resummation scheme for a perturbative expansion in the inverse particle density, allowing an accurate analytical computation of the dynamical structure factor within the range of densities encountered in real systems.
Talk given at the '8th International Workshop on Disordered Systems' Andalo, Trento, 12-15 March 2001