Inhomogeneous elastic response of silica glass

Abstract

Using large scale molecular dynamics simulations we investigate the properties of the {\em non-affine} displacement field induced by macroscopic uniaxial deformation of amorphous silica,a strong glass according to Angell's classification. We demonstrate the existence of a length scale $\xi$ characterizing the correlations of this field (corresponding to a volume of about 1000 atoms), and compare its structure to the one observed in a standard fragile model glass. The "Boson-peak'' anomaly of the density of states can be traced back in both cases to elastic inhomogeneities on wavelengths smaller than $\xi$, where classical continuum elasticity becomes simply unapplicable.

References in corpus (16)

• Dynamics of Viscoplastic Deformation in Amorphous Solids
• Direct experimental evidence of a growing length scale accompanying the glass transition
• Cooling rate effects in amorphous Silica: A Computer Simulation Study
• Anharmonicity, vibrational instability and Boson peak in glasses
• Continuum limit of amorphous elastic bodies: A finite-size study of low frequency harmonic vibrations
• Deformation and flow of a two-dimensional foam under continuous shear
• Continuum limit of amorphous elastic bodies (III): Three dimensional systems
• Glass-specific behavior in the damping of acoustic-like vibrations
• Nonaffine Correlations in Random Elastic Media
• High Frequency Dynamics of Amorphous Silica
• Vibrations of amorphous, nanometric structures: When does continuum theory apply?
• Observation of the onset of strong scattering on high frequency acoustic phonons in densified silica glass
• The nature of the short wavelength excitations in vitreous silica: X-Rays Brillouin scattering study
• Scale separation in granular packings: stress plateaus and fluctuations
• Effect of physical aging on the low-frequency vibrational density of states of a glassy polymer
• The crossover from propagating to strongly scattered acoustic modes of glasses observed in densified silica

Cited by in corpus (64)

• A kinetic theory of plastic flow in soft glassy materials
• Modeling the mechanics of amorphous solids at different length and time scales
• Assessment and optimization of the fast inertial relaxation engine (FIRE) for energy minimization in atomistic simulations and its implementation in LAMMPS
• Local inversion-symmetry breaking controls the boson peak in glasses and crystals
• Intermediate phase, network demixing, boson and floppy modes, and compositional trends in glass transition temperatures of binary AsxS1-x system
• Amorphous silica modeled with truncated and screened Coulomb interactions: A molecular dynamics simulation study
• Boson peak and Ioffe-Regel criterion in amorphous silicon-like materials: the effect of bond directionality
• Heat transport in model jammed solids
• Formation and growth of shear bands in glasses: existence of an underlying directed percolation transition
• New optimization scheme to obtain interaction potentials for oxide glasses
• Power law viscoelasticity of a fractal colloidal gel
• Hypersound damping in vitreous silica measured by picosecond acoustics
• Microscopic dynamics and failure precursors of a gel under mechanical load
• Hypostatic jammed packings of frictionless nonspherical particles
• Shear modulus of simulated glass-forming model systems: Effects of boundary condition, temperature and sampling time
• Particle displacements in the elastic deformation of amorphous materials: local fluctuations vs. non-affine field
• Probing a critical length scale at the glass transition
• Strain localization and anisotropic correlations in a mesoscopic model of amorphous plasticity
• Theory of the Structural Glass Transition: A Pedagogical Review
• Theory of the Jamming Transition at Finite Temperature
• Revisiting the slow dynamics of a silica melt using Monte Carlo simulations
• Structural origins of the boson peak in metals: From high-entropy alloys to metallic glasses
• Relationship between bond-breakage correlations and four-point correlations in heterogeneous glassy dynamics: Configuration changes and vibration modes
• On Variational Arguments for Vibrational Modes near Jamming
• Propagative and diffusive regimes of acoustic damping in bulk amorphous material
• Disentangling boson peaks and Van Hove singularities in a model glass
• Atomic theory of viscoelastic response and memory effects in metallic glasses
• Boson peak, elasticity, and glass transition temperature in polymer glasses: Effects of the rigidity of chain bending
• Relationship between vibrations and dynamical heterogeneity in a model glass former: extended soft modes but local relaxation
• Non-affine deformations of inherent structure as signature of cooperativity in supercooled liquids
• Evolution of covalent networks under cooling: contrasting the rigidity window and jamming scenarios
• Thermal processing and enthalpy storage of an amorphous solid: a molecular dynamics study
• The nature of non-phononic excitations in disordered systems
• Tracking the connection between disorder and energy landscape in glasses using geologically hyperaged amber
• On the Dynamics of Glassy Systems
• Role of disorder in determining the vibrational properties of mass-spring networks
• Boson Peak decouples from elasticity in glasses with low connectivity
• Deformation of inherent structures to detect long-range correlations in supercooled liquids
• Localization-delocalization transition for disordered cubic harmonic lattices
• Local elastic response measured near the colloidal glass transition
• Impact of elastic heterogeneity on the propagation of vibrations at finite temperatures in glasses
• Vibrational states and disorder in continuously compressed model glasses
• Stringlet Excitation Model of the Boson Peak
• Avalanches and Structural Change in Cyclically Sheared Silica Glass
• Compressibility and pressure correlations in isotropic solids and fluids
• Strain-controlled critical slowing down in the rheology of disordered networks
• Self-consistent elastic continuum theory of degenerate, equilibrium aperiodic solids
• Normal modes, and acoustic properties, of an elastic solid with line defects
• Roughness of oxide glass subcritical fracture surfaces
• Edge Mode Amplification in Disordered Elastic Networks
• Pressure in the Landau-Ginzburg Functional: Pascal's Law, Nucleation in Fluid Mixtures, a Meanfield Theory of Amphiphilic Action, and Interface Wetting in Glassy Liquids
• Sound damping in frictionless granular materials: The interplay between configurational disorder and inelasticity
• Phonons in stringlet-land and the boson peak
• Theory of heterogeneous viscoelasticity
• Level statistics and Anderson delocalization in two-dimensional granular materials
• The role of microscopic friction in statistics and scaling laws of avalanches
• Enhanced Vibrational Stability in Glass Droplets
• VUV Brillouin scattering from superpolished vitreous silica
• Local elastic properties of polystyrene nanocomposites increase significantly due to non-affine deformations
• Long-Range Correlations in Elastic Moduli and Local Stresses at the Unjamming Transition
• Correlations in the shear flow of athermal amorphous solids: A principal component analysis
• Nonaffine deformation under compression and decompression of a flow-stabilized solid
• A continuum model reproducing the multiple frequency crossovers in acoustic attenuation in glasses
• Open and anisotropic soft regions in a model polymer glass