The central role of thermal collective strain in the relaxation of structure in a supercooled liquid

Details The central role of thermal collective strain in the relaxation of structure in a supercooled liquid The central role of thermal collective strain in the relaxation of structure in a supercooled liquid

2009-06-09

arxiv.org/abs/0906.1766v3

Phys. Rev. E 80, 061501 (2009)

Physics

Condensed Matter

Soft Condensed Matter

23 pages, 9 figures, expanded discussion, additional references

Scientific paper

10.1103/PhysRevE.80.061501

The spatial distribution of structural relaxation in a supercooled liquid is studied using molecular dynamics simulations of a 2D 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 coupled action of local reorganizations and unrecoverable thermal strains.

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