Acoustic wave propagation through a supercooled liquid: A normal mode analysis

Abstract

The mechanism of acoustic wave propagation in supercooled liquids is not yet fully understood since the vibrational dynamics of supercooled liquids are strongly affected by their amorphous inherent structures. In this paper, the acoustic wave propagation in a supercooled model liquid is studied by using normal mode analysis. Due to the highly disordered inherent structure, a single acoustic wave is decomposed into many normal modes in broad frequency range. This causes the rapid decay of the acoustic wave and results in anomalous wavenumber dependency of the dispersion relation and the rate of attenuation.

11 pages, 5 figures (color)

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Cited by in corpus (4)

• Relation of vibrational excitations and thermal conductivity to elastic heterogeneities in disordered solids
• Contribution to Viscosity from the Structural Relaxation via the Atomic Scale Green-Kubo Stress Correlation Function
• Spatiotemporal heterogeneity of local free volumes in highly supercooled liquid
• Analysis of structural correlations in a model binary 3D liquid through the eigenvalues and eigenvectors of the atomic stress tensors