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Volume 167, 2013
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Lifetimes and lengthscales of structural motifs in a model glassformer

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Abstract

We use a newly-developed method to identify local structural motifs in a popular model glassformer, the Kob–Andersen binary Lennard-Jones mixture. By measuring the lifetimes of a zoo of clusters, we find that 11-membered bicapped square antiprisms, denoted as 11A, have longer lifetimes on average than other structures considered. Other long-lived clusters are similar in structure to the 11A cluster. These clusters group into ramified networks that are correlated with slow particles and act to retard the motion of neighbouring particles. The structural lengthscale associated with these networks does not grow as fast as the dynamical lengthscale ξ4 as the system is cooled, in the range of temperatures our molecular dynamics simulations access. Thus we find a strong, but indirect, correlation between static structural ordering and slow dynamics.

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Publication details

The article was received on 07 May 2013, accepted on 07 Jun 2013 and first published on 07 Jun 2013


Article type: Paper
DOI: 10.1039/C3FD00078H
Citation: Faraday Discuss., 2013,167, 405-423
  • Open access: Creative Commons BY-NC license
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    Lifetimes and lengthscales of structural motifs in a model glassformer

    A. Malins, J. Eggers, H. Tanaka and C. P. Royall, Faraday Discuss., 2013, 167, 405
    DOI: 10.1039/C3FD00078H

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