Excess Vibrational Modes and the Boson Peak in Model Glasses

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The excess low-frequency normal modes for two widely-used models of glasses were studied at zero temperature. The onset frequencies for the anomalous modes for both systems agree well with predictions of a variational argument, which is based on analyzing the vibrational energy originating from the excess contacts per particle over the minimum number needed for mechanical stability. Even though both glasses studied have a high coordination number, most of the additional contacts can be considered to be weak.
4 pages, 3 figures, submitted to Physical Review Letters

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/127871

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0611474
 http://arxiv.org/abs/cond-mat/0611474
 Physical Review Letters 98, 175502 (2007)
 doi:10.1103/PhysRevLett.98.175502

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arXiv