The Boson Peak and its Relation with Acoustic Attenuation in Glasses

Abstract

Experimental results on the density of states and on the acoustic modes of glasses in the THz region are compared to the predictions of two categories of models. A recent one, solely based on an elastic instability, does not account for most observations. Good agreement without adjustable parameters is obtained with models including the existence of non-acoustic vibrational modes at THz frequency, providing in many cases a comprehensive picture for a range of glass anomalies.

4 pages, 3 figures, Physical Review Letters in press

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Cited by in corpus (22)

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• Scaling the Temperature-dependent Boson Peak of Vitreous Silica with the high-frequency Bulk Modulus derived from Brillouin Scattering Data
• Propagative and diffusive regimes of acoustic damping in bulk amorphous material
• Elastic moduli fluctuations predict wave attenuation rates in glasses
• Detection of boson peak and fractal dynamics of disordered system using terahertz spectroscopy
• Unifying description of the vibrational anomalies of amorphous materials
• Correlation between vibrational anomalies and emergent anharmonicity of local potential energy landscape in metallic glasses
• A random matrix approach to the boson peak and Ioffe-Regel criterion in amorphous solids
• Tracking the connection between disorder and energy landscape in glasses using geologically hyperaged amber
• Density of states in random lattices with translational invariance
• The vibrational density of states of a disordered gel model
• Excitation of vibrational soft modes in disordered systems using active oscillation
• Quasi-localized vibrational modes, Boson peak and sound attenuation in model mass-spring networks
• A thermodynamic treatment of the glass transition
• The mixing of polarizations in the acoustic excitations of disordered media with local isotropy
• A continuum model reproducing the multiple frequency crossovers in acoustic attenuation in glasses
• Rayleigh anomalies and disorder-induced mixing of polarizations at nanoscale in amorphous solids. Testing 1-octyl-3-methylimidazolium chloride glass
• Application of the random matrix theory to the boson peak in glasses
• Understanding the Low-Frequency Modes in Disordered Systems at Single-Particle Level