Vibrational spectrum of topologically disordered systems
The topological nature of the disorder of glasses and supercooled liquids strongly affects their high-frequency dynamics. In order to understand its main features, we analytically studied a simple topologically disordered model, where the particles oscillate around randomly distributed centers, inte...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2001 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/60324 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/60324 |
| Access Level: | acceso abierto |
| Palabra clave: | 53 Frequency propagating modes Instantaneous normal-modes Glass-forming liquids Vitreous silica Dynamics Sound Approximation Localization Exitations Relaxation. Física-Modelos matemáticos |
| Sumario: | The topological nature of the disorder of glasses and supercooled liquids strongly affects their high-frequency dynamics. In order to understand its main features, we analytically studied a simple topologically disordered model, where the particles oscillate around randomly distributed centers, interacting through a generic pair potential. We present results of a resummation of the perturbative expansion in the inverse particle density for the dynamic structure factor and density of states. This gives accurate results for the range of densities found in real systems. |
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