Structural and dynamical heterogeneity in a glass forming liquid

Abstract

We use the ``isoconfigurational ensemble'' [Phys. Rev. Lett. {\bf 93}, 135701 (2004)] to analyze both dynamical and structural properties in simulations of a glass forming molecular liquid. We show that spatially correlated clusters of low potential energy molecules are observable on the time scale of structural relaxation, despite the absence of spatial correlations of potential energy in the instantaneous structure of the system. We find that these structural heterogeneities correlate with dynamical heterogeneities in the form of clusters of low molecular mobility.

5 pages, 4 figures

References in corpus (13)

• Direct experimental evidence of a growing length scale accompanying the glass transition
• Spatial Correlations of Mobility and Immobility in a Glassforming Lennard-Jones Liquid
• Predicting the long time dynamic heterogeneity in a supercooled liquid on the basis of short time heterogeneities
• What do we learn from the local geometry of glass-forming liquids?
• Energy Barriers and Activated Dynamics in a Supercooled Lennard-Jones Liquid
• Fractional Stokes-Einstein and Debye-Stokes-Einstein relations in a network forming liquid
• Density minimum and liquid-liquid phase transition
• Decoupling of diffusion from structural relaxation and spatial heterogeneity in a supercooled simple liquid
• Spatially heterogeneous dynamics and dynamic facilitation in a model of viscous silica
• What does the potential energy landscape tell us about the dynamics of supercooled liquids and glasses?
• Temperature dependence of spatially heterogeneous dynamics in a model of viscous silica
• On the relationship between structure and dynamics in a supercooled liquid
• On the critical behavior of the specific heat in glass-formers

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• Relaxation and physical aging in network glasses: a review
• Information-theoretic measurements of coupling between structure and dynamics in glass-formers
• Local thermal energy as a structural indicator in glasses
• Breakdown of the Stokes-Einstein Relation Above the Melting Temperature in a Liquid Phase-Change Material
• The glass transition of two-dimensional binary soft disk mixtures with large size ratios
• Particle dynamics in fluids with random interactions
• The microscopic origins of stretched exponential relaxation in two model glass-forming liquids as probed by simulations in the isoconfigurational ensemble
• Role of structure in the alpha and beta dynamics of a simple glass-forming liquid
• Spatiotemporal heterogeneity of local free volumes in highly supercooled liquid
• Rearrangements during slow compression of a jammed two-dimensional emulsion
• On the static length of relaxation and the origin of dynamic heterogeneity in fragile glass-forming liquids
• Structural (dis)order and dynamic propensity in a mildly undercooled glass-forming liquid: Spatial correlations and the role of crystalline environments
• Neglecting polydispersity degrades propensity measurements in supercooled liquids