Nature of vibrational eigenmodes in topologically disordered solids

Article

关键词: DYNAMICAL STRUCTURE FACTOR;    VITREOUS SILICA;    BOSON PEAK;    SYSTEMS;    EXCITATIONS;    LOCALIZATION;    GLASS;    LIQUID;    ORDER;   

DOI  :  10.1103/PhysRevB.65.104302

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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