Excess vibrational modes and the boson peak in model glasses

Ning Xu, Matthieu Wyart, Andrea J. Liu, Sidney R. Nagel

    Research output: Contribution to journalArticlepeer-review


    The excess low-frequency normal modes for two widely used models of glasses are 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.

    Original languageEnglish (US)
    Article number175502
    JournalPhysical Review Letters
    Issue number17
    StatePublished - Apr 24 2007

    ASJC Scopus subject areas

    • General Physics and Astronomy


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