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Proceedings Paper

Local fluctuations in the nonequilibrium dynamics of a Lennard-Jones glass
Author(s): Horacio E. Castillo; Parthapratim Biswas
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Paper Abstract

We investigate local fluctuations in the out of equilibrium dynamics of a simple glass former, a binary Lennard-Jones system, after a quench to the glass state. Motivated by recent experiments that probe fluctuations in glassy materials at distance scales of the order of tens of nanometers, we define the local (i.e. averaged over a small region in the sample) two-time mean square displacement Δr(t,tw) and two-time intermediate scattering function Cr(t,tw). We study the probability distributions for the values of these local two-time functions as a function of both time variables. We discuss the connection between the scaling behavior of the probability distributions and a soft mode controlling the slow dynamics.

Paper Details

Date Published: 25 May 2004
PDF: 10 pages
Proc. SPIE 5469, Fluctuations and Noise in Materials, (25 May 2004); doi: 10.1117/12.547149
Show Author Affiliations
Horacio E. Castillo, Ohio Univ. (United States)
Parthapratim Biswas, Ohio Univ. (United States)

Published in SPIE Proceedings Vol. 5469:
Fluctuations and Noise in Materials
Dragana Popovic; Michael B. Weissman; Zoltan A. Racz, Editor(s)

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