Local fluctuations in the nonequilibrium dynamics of a Lennard-Jones glass

Horacio E. Castillo; Parthapratim Biswas

doi:10.1117/12.547149

25 May 2004 Local fluctuations in the nonequilibrium dynamics of a Lennard-Jones glass

Horacio E. Castillo, Parthapratim Biswas

Proceedings Volume 5469, Fluctuations and Noise in Materials; (2004) https://doi.org/10.1117/12.547149
Event: Second International Symposium on Fluctuations and Noise, 2004, Maspalomas, Gran Canaria Island, Spain

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 Δ_r(t,t_w) and two-time intermediate scattering function C_r(t,t_w). 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.

Citation Download Citation

Horacio E. Castillo and Parthapratim Biswas "Local fluctuations in the nonequilibrium dynamics of a Lennard-Jones glass", Proc. SPIE 5469, Fluctuations and Noise in Materials, (25 May 2004); https://doi.org/10.1117/12.547149

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