Secondary relaxation in a supercooled binary mixture

Harbola, U. ; Das, Shankar P. (2003) Secondary relaxation in a supercooled binary mixture International Journal of Modern Physics B, 17 (12). pp. 2395-2415. ISSN 0217-9792

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We investigate the structural relaxation in a binary fluid over the time scales of β-relaxation regime. For this we have used a recently proposed self-consistent mode-coupling theory (MCT) formulated from the fluctuating nonlinear hydrodynamics approach. We have considered here both the hard sphere as well as the Kob-Andersen Lennard-Jones1 binary mixtures. From the solution of the MCT equations obtained here the initial power law decay t-a appears to be very weak. For the later part of the β-relaxation regime, the density correlation functions follow von Schweidler (VS) power law decay tb. The validity of the so-called factorization property of the MCT over the β-relaxation is also analyzed. We find the exponent b to be in qualitative agreement with the findings from the computer simulations of the same system by Kob and Andersen.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
ID Code:93980
Deposited On:30 Jun 2012 12:30
Last Modified:30 Jun 2012 12:30

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