Dynamic heterogeneity and non-Gaussian behavior in a model supercooled liquid

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dc.creatorShell, M. Scott
dc.creatorDebenedetti, Pablo G.
dc.creatorStillinger, Frank H.
dc.date2005-06-23
dc.date.accessioned2026-07-07T06:26:42Z
dc.date.available2026-07-07T06:26:42Z
dc.descriptionWe use a recently-derived reformulation of the diffusion constant [Stillinger F H and Debenedetti P G 2005 J. Phys. Chem. B 109 6604] to investigate heterogeneous dynamics and non-Gaussian diffusion in a binary Lennard-Jones mixture. Our work focuses on the joint probability distribution of particles with velocity v_0 at time t=0 and eventual displacement Delta x at time t=Delta t. We show that this distribution attains a distinctive shape at the time of maximum non-Gaussian behavior in the supercooled liquid. By performing a two-Gaussian fit of the displacement data, we obtain, in a non-arbitrary manner, two diffusive length scales inherent to the supercooled liquid and use them to identify spatially separated regions of mobile and immobile particles.
dc.description15 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0506608
dc.identifierhttp://arxiv.org/abs/cond-mat/0506608
dc.identifierJ. Phys.: Condens. Matter 17, S4035 (2005).
dc.identifierdoi:10.1088/0953-8984/17/49/002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97187
dc.subjectSoft Condensed Matter
dc.titleDynamic heterogeneity and non-Gaussian behavior in a model supercooled liquid
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