Nature of vibrational eigenmodes in topologically disordered solids

Abstract

We use a local projectional analysis method to investigate the effect of topological disorder on the vibrational dynamics in a model glass simulated by molecular dynamics. Evidence is presented that the vibrational eigenmodes in the glass are generically related to the corresponding eigenmodes of its crystalline counterpart via disorder-induced level-repelling and hybridization effects. It is argued that the effect of topological disorder in the glass on the dynamical matrix can be simulated by introducing positional disorder in a crystalline counterpart.

7 pages, 6 figures, PRB, to be published

References in corpus (1)

• Vibrational spectrum of topologically disordered systems

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