Central role of thermal collective strain in the relaxation of structure in a supercooled liquid.

  title={Central role of thermal collective strain in the relaxation of structure in a supercooled liquid.},
  author={Asaph Widmer‐Cooper and Peter Harrowell},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={80 6 Pt 1},
The spatial distribution of structural relaxation in a supercooled liquid is studied using molecular dynamics simulations of a two-dimensional binary mixture. It is shown that the spatial heterogeneity of the relaxation along with the time scale of the relaxation is determined, not by the frequency with which particles move a distance pi/2kBragg, but by the frequency with which particles can achieve persistent displacements. We show that these persistent displacements are achieved through the… 
Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode Coupling Temperature.
It is shown that long-ranged, elastically mediated facilitation appears below the mode coupling temperature, adding to the short-range component present at all temperatures, suggesting deep connections between the supercooled liquid and glass states.
Excitations Are Localized and Relaxation Is Hierarchical in Glass-Forming Liquids
Supercooled glass-forming liquids are known to have complex and sluggish macroscopic dynamics. But, what are the atomic motions underlying such dynamics? Researchers from the US and Britain use
The Packing Landscapes of Quasi-One Dimensional Hard Sphere Systems
Packing Landscapes of Constrained Hard Sphere Fluids By Mahdi Zaeifi Yamchi When a liquid is cooled below its equilibrium freezing temperature, it becomes supercooled and the molecular motions slow
Replica theory of the rigidity of structural glasses.
  • H. Yoshino
  • Materials Science
    The Journal of chemical physics
  • 2012
With the aid of the replica method which enables disentanglement of thermal fluctuations in liquids into intra-state and inter-state fluctuations, the rigidity of metastable amorphous solid states in the supercooled liquid and glass phases is extracted.
Structural phases in non-additive soft-disk mixtures: glasses, substitutional order, and random tilings.
MD simulation studies of binary soft disks with negative deviations from additivity that include evidence of accumulation of crystal-like structures in metastable liquids prior to crystallization and the occurrence of a liquid to random-tiling transition are reported.
Grains, Glasses and Jamming
On the one hand, very strong similarities have been reported be- tween the dynamical behaviour of vibrated dense packings of grains and su- percooled liquids at the onset of the glass transition. On
Tensorial analysis of Eshelby stresses in 3D supercooled liquids.
It is demonstrated that the inherent stress field of 3D supercooled liquids is power law correlated and carries the signature of Eshelby fields, thus supporting the idea that relaxation events give rise to Eshelbys stress fluctuations that accumulate over time.
Identifying structural signatures of shear banding in model polymer nanopillars.
This work identifies mesoscale defects that lead to shear banding in model polymer nanopillars well below the glass transition temperature as a function of pillar diameter, and demonstrates that softness, a quantity that relates particle-level structure to dynamics on short time and length scales, can predict large time andlength scale phenomena related to material failure.
Liquid-solid transitions with applications to self-assembly
This chapter is intended to be a prologue to a chapter on “How to Train Your Dragon”, which explores the themes of self-confidence and self-esteem and the importance of positive emotions.


Kinetic theory of plastic flow in soft glassy materials.
A kinetic model for the elastoplastic dynamics of a jammed material is proposed, which takes the form of a nonlocal--Boltzmann-like--kinetic equation for the stress distribution function, predicting finite size effects in the flow behavior, as well as the absence of an intrinsic local flow curve.