Spatiotemporal hierarchy of relaxation events, dynamical heterogeneities, and structural reorganization in a supercooled liquid.
By Raphaël Candelier, A. Widmer‐Cooper, Jonathan K. Kummerfeld, O. Dauchot, Giulio Biroli, P. Harrowell, David R. Reichman. 2009
139 citations recorded by the source corpus.
We identify the pattern of microscopic dynamical relaxation for a two-dimensional glass-forming liquid. On short time scales, bursts of irreversible particle motion, called cage jumps, aggregate into clusters. On larger time scales, clusters aggregate both spatially and temporally into avalanches. This propagation of mobility takes place along the soft regions of the systems, which have been identified by computing isoconfigurational Debye-Waller maps. Our results characterize the way in which dynamical heterogeneity evolves in moderately supercooled liquids and reveal that it is astonishingly similar to the one found for dense glassy granular media.
Subfields: Atmospheric Science, Global and Planetary Change, Materials Chemistry
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Citations in the corpus
- The role of local structure in dynamical arrest (2014, background): “On the other hand colloidal systems obey the laws of statistical mechanics [234], and although it must be driven and is thus far from equilibrium, nonetheless granular matter can exhibit “thermal” behaviour [42, 70].”