String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid

Details String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid

1997-06-27

arxiv.org/abs/cond-mat/9706277v1

Phys. Rev. Lett. 80, 2338 (1998)

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages of RevTex, 6 postscript figures, uses epsf.sty

Scientific paper

10.1103/PhysRevLett.80.2338

A large-scale molecular dynamics simulation is performed on a glass-forming Lennard-Jones mixture to determine the nature of dynamical heterogeneities which arise in this model fragile liquid. We observe that the most mobile particles exhibit a cooperative motion in the form of string-like paths (``strings'') whose mean length and radius of gyration increase as the liquid is cooled. The length distribution of the strings is found to be similar to that expected for the equilibrium polymerization of linear polymer chains.

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