Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode-Coupling Temperature

Rahul N Chacko (1, 2) , François P. Landes (3) , Giulio Biroli (4) , Olivier Dauchot (5) , Andrea J Liu (1) , David R Reichman (6)

1 University of Pennsylvania
2 James Franck Institute
3 TAU - TAckling the Underspecified
4 ENS-PSL - École normale supérieure - Paris
5 Gulliver (UMR 7083)
6 Columbia University [New York]

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-range, 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.

Domains: Physics [physics]; Condensed Matter [cond-mat]; Soft Condensed Matter [cond-mat.soft]; Physics [physics]; Condensed Matter [cond-mat]; Disordered Systems and Neural Networks [cond-mat.dis-nn]

Rahul N Chacko, François P. Landes, Giulio Biroli, Olivier Dauchot, Andrea J Liu, et al.. Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode-Coupling Temperature. Physical Review Letters, 2021, 127 (4), ⟨10.1103/PhysRevLett.127.048002⟩. ⟨hal-03345449⟩