Vibrational spectra in glasses



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Grigera, T.S. and Martín Mayor, Víctor and Parisi, G. and Verrocchio, P. (2002) Vibrational spectra in glasses. Philosophical Magazine B: physics of condensed matter statistical mechanics electronic optical and magnetic properties, 82 (6). pp. 637-649. ISSN 0141-8637

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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.

Item Type:Article
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© 2002 Taylor & Francis. International Workshop on Disordered Systems (8th. 2001. Andalo, Italy). VMM was partly supported by CICyT AEN99-0990, AEN97-1693 and M.E.C. TSG was supported in part by CONICET (Argentina).

Uncontrolled Keywords:Frequency propagating modes; Instantaneous normal-modes; Vitreous silica; Disordered-systems; Forming liquids; Dynamics; Scattering; Approximation; Excitations.
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:46442
Deposited On:09 Mar 2018 09:15
Last Modified:09 Mar 2018 09:15

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