Universal low-frequency vibrational modes in silica glasses

Abstract

It was recently shown that different simple models of glass formers with binary interactions define a universality class in terms of the density of states of their quasi-localized low-frequency modes. Explicitly, once the hybridization with standard Debye (extended) modes is avoided, a number of such models exhibit a universal density of state, depending on the mode frequencies as $D(\omega )\sim {\omega }^4$. It is unknown however how wide is this universality class, and whether it also pertains to more realistic models of glass formers. To address this issue we present analysis of the quasi-localized modes in silica, a network glass which has both binary and ternary interactions. We conclude that in 3-dimensions silica exhibits the very same frequency dependence at low frequencies, suggesting that this universal form is a generic consequence of amorphous glassiness.

arXiv comment4 pages, 5 figures, Submitted in parallel to "Universality of the nonphononic vibrational spectrum across different classes of computer glasses" to arXiv on March 17th, 2020

References in corpus (16)

• Amorphous Systems in Athermal, Quasistatic Shear
• Anharmonicity, vibrational instability and Boson peak in glasses
• Continuum limit of the vibrational properties of amorphous solids
• Statistics and properties of low-frequency vibrational modes in structural glasses
• Statistical Physics of the Yielding Transition in Amorphous Solids
• Vibrational instability, two-level systems and Boson peak in glasses
• Bosonic Excitations in Random Media
• Universal non-phononic density of states in 2D, 3D and 4D glasses
• Universality of the nonphononic vibrational spectrum across different classes of computer glasses
• Spatial structure of quasi-localized vibrations in nearly jammed amorphous solids
• Probing the non-Debye low frequency excitations in glasses through random pinning
• Wave attenuation in glasses: Rayleigh and generalized-Rayleigh scattering scaling
• Soft Modes, Localization and Two-Level Systems in Spin Glasses
• Elementary plastic events in amorphous silica
• Temperature-Dependent Defect Dynamics in the Network Glass SiO2
• Instabilities of Time-averaged Configurations in Thermal Glasses

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• Low-frequency excess vibrational modes in two-dimensional glasses
• Mean-field model of interacting quasilocalized excitations in glasses
• Marginal stability of soft anharmonic mean field spin glasses
• Universal Density of Low Frequency States in Amorphous Solids at Finite Temperatures
• Universal non-Debye low-frequency vibrations in sheared amorphous solids
• Density of States below the First Sound Mode in 3D Glasses
• Delocalization transition in low energy excitation modes of vector spin glasses
• Low-Frequency Vibrational States in Ideal Glasses with Random Pinning
• Non-phononic density of states of two-dimensional glasses revealed by random pinning
• Internally-stressed and positionally-disordered minimal complexes yield glasslike nonphononic excitations
• Low energy excitations of mean-field glasses
• Tunable thermal conductivity of sustainable geopolymers by Si/Al ratio and moisture content: insights from atomistic simulations
• Experimental evidence for the ${\omega }^4$ tail of the nonphononic spectra of glasses
• Enhanced Vibrational Stability in Glass Droplets
• Testing the Heterogeneous-Elasticity Theory for low-energy excitations in structural glasses
• Soft modes in vector spin glass models on sparse random graphs
• Universal Density of Low Frequency States in Silica Glass at Finite Temperatures
• Two-level systems and harmonic excitations in a mean-field anharmonic quantum glass
• Enumerating low-frequency nonphononic vibrations in computer glasses
• Vibrational density of states of amorphous solids with long-ranged power-law correlated disorder in elasticity
• Computational Methods toward Ultrastable Glasses