Structural origin of enhanced translational diffusion in two-dimensional hard-ellipse fluids

The static correlations and diffusive dynamics of hard ellipses are investigated in the isotropic and nematic phases by Monte Carlo simulation. In particular, an enhancement of the translational diffusion with respect to the rotational diffusion is observed at an onset concentration φ_{on} within th...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2012-06, Vol.85 (6 Pt 1), p.061707-061707, Article 061707
Main Authors: Davatolhagh, S, Foroozan, S
Format: Article
Language:English
Subjects:
Computer Simulation
Crystallization - methods
Diffusion
Liquid Crystals - chemistry
Materials Testing - methods
Models, Chemical
Models, Molecular
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Summary:The static correlations and diffusive dynamics of hard ellipses are investigated in the isotropic and nematic phases by Monte Carlo simulation. In particular, an enhancement of the translational diffusion with respect to the rotational diffusion is observed at an onset concentration φ_{on} within the isotropic phase, which is explained in terms of the formation of unstable nematic-like regions with a mean lifetime that exceeds the characteristic time of diffusion at φ_{on}. The relevance to the onset of spatially heterogeneous dynamics in supercooled glass-forming liquids is discussed.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.85.061707