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Title:A Random first order theory of liquid-glass transition
Author(s):Xia, Xiaoyu
Director of Research:Wolynes, P.G.
Doctoral Committee Member(s):Phillips, Philip W.; Weissman, Michael B.; Chiang, Tai-Chang
Department / Program:Physics
Subject(s):glassy dynamics
liquid-glass transition
Arrhenius law
Abstract:It is believed that all classical fluids could form glasses if cooled sufficiently fast so as to avoid crystallization. Various phenomena including violation of the usual Arrhenius law, stretched relaxations, deviations from the Stokes-Einstein relation in hydrodynamics, and aging have been observed in the laboratory. In this thesis, a microscopically motivated theory of glassy dynamics based on an underlying random first order transition is developed to explain the magnitude and variation of free energy barriers for glassy relaxation. A variety of empirical correlations embodied in the concept of liquid "fragility" are shown to be quantitatively explained by such a model. Fragility parameters, the size of heterogeneities, the degree of stretching of relaxations, and the enhancement of translational diffusion are derived from theory. The wide variety of kinetic behaviors in liquids of quite disparate chemical nature reflects quantitative rather than qualitative differences in their energy landscapes as it turns out. lll
Issue Date:2001
Genre:Dissertation / Thesis
Rights Information:© Copyright Xiaoyu Xia, 2001
Date Available in IDEALS:2012-05-23
Identifier in Online Catalog:4539118

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