Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode Coupling Temperature
Rahul Chacko, François P. Landes, Giulio Biroli, Olivier Dauchot, Andrea J. Liu, David R. Reichman
Abstract
As liquids approach the glass transition temperature, dynamical heterogeneity emerges as a crucial universal feature of their behavior. Dynamic facilitation, where local motion triggers further motion nearby, plays a major role in this phenomenon. Here we show that long-ranged, elastically mediated facilitation appears below the mode coupling temperature, adding to the short-range component present at all temperatures. Our results suggest deep connections between the supercooled liquid and glass states, and pave the way for a deeper understanding of dynamical heterogeneity in glassy systems.
Topics & Concepts
Coupling (piping)Mode (computer interface)Statistical physicsPhysicsMaterials scienceComputer scienceOperating systemMetallurgyForce Microscopy Techniques and ApplicationsMaterial Dynamics and PropertiesHigh-pressure geophysics and materials