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Nature of vibrational eigenmodes in topologically disordered solids

S. I. Simdyankin·S. N. Taraskin·M. Elenius·S. R. Elliott·M. Dzugutov
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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.

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S. I. Simdyankin, S. N. Taraskin, M. Elenius, S. R. Elliott, M. Dzugutov. 2002-01-11. Nature of vibrational eigenmodes in topologically disordered solids. https://doi.org/10.1103/physrevb.65.104302

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