Department of Physics Papers

Document Type

Journal Article

Date of this Version

4-24-2007

Abstract

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.

Comments

Suggested Citation:
N. Xu, M. Wyart, A.J. Liu and S.R. Nagel. (2007). Excess Vibrational Modes and the Boson Peak in Model Glasses. Physical Review Letters 98, 175502.

© 2007 The American Physical Society
http://dx.doi.org/10.1103/PhysRevLett.98.175502

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Date Posted: 18 May 2011

This document has been peer reviewed.