Nature of vibrational eigenmodes in topologically disordered solids

Details Nature of vibrational eigenmodes in topologically disordered solids Nature of vibrational eigenmodes in topologically disordered solids

2001-08-21

arxiv.org/abs/cond-mat/0108336v3

Phys. Rev. B 65, 104302 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages, 6 figures, PRB, to be published

Scientific paper

10.1103/PhysRevB.65.104302

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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