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Roles of icosahedral and crystal-like order in the hard spheres glass transition

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  • Mathieu Leocmach

    (Institute of Industrial Science, University of Tokyo)

  • Hajime Tanaka

    (Institute of Industrial Science, University of Tokyo)

Abstract

A link between structural ordering and slow dynamics has recently attracted much attention from the context of the origin of glassy slow dynamics. Candidates for such structural order are icosahedral, exotic amorphous and crystal-like. Each type of order is linked to a different scenario of glass transition. Here we experimentally access local structural order in polydisperse hard spheres by particle-level confocal microscopy. We identify the key structures as icosahedral and FCC-like order, both statistically associated with slow particles. However, when approaching the glass transition, the icosahedral order does not grow in size, whereas crystal-like order grows. It is the latter that governs the dynamics and is linked to dynamic heterogeneity. This questions the direct role of the local icosahedral ordering in glassy slow dynamics and suggests that the growing length scale of structural order is essential for the slowing down of dynamics and the non-local cooperativity in particle motion.

Suggested Citation

  • Mathieu Leocmach & Hajime Tanaka, 2012. "Roles of icosahedral and crystal-like order in the hard spheres glass transition," Nature Communications, Nature, vol. 3(1), pages 1-8, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1974
    DOI: 10.1038/ncomms1974
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    Cited by:

    1. Yuan-Chao Hu & Hajime Tanaka, 2022. "Revealing the role of liquid preordering in crystallisation of supercooled liquids," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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