Slow dynamics of supercooled colloidal fluids: Spatial heterogeneities and nonequilibrium density fluctuations

Details Slow dynamics of supercooled colloidal fluids: Spatial heterogeneities and nonequilibrium density fluctuations Slow dynamics of supercooled colloidal fluids: Spatial heterogeneities and nonequilibrium density fluctuations

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..519...21t&link_type=abstract

STATISTICAL PHYSICS: Third Tohwa University International Conference. AIP Conference Proceedings, Volume 519, pp. 21-32 (2000).

Physics

Condensed Matter

Statistical Mechanics

1

Emulsions And Suspensions, Solid-Liquid Transitions, Order-Disorder Transformations, Statistical Mechanics Of Model Systems, Self-Diffusion And Ionic Conduction In Nonmetals

Scientific paper

How the idea of the dynamic anomaly of the self-diffusion coefficient recently proposed by the present author works on the study of equilibrium and nonequilibrium supercooled colloidal liquids is discussed for two kinds of model suspensions, neutral and charged hard-sphere suspensions. Near colloidal glass transition, the long-lived, spatially heterogeneous glassy domains are shown to be formed for intermediate times in equilibrium and nonequilibrium systems. Those spatial heterogeneities are responsible for the slow relaxation of the density fluctuations. In fact, the long-known phenomena similar to those in glass-forming materials, such as the stretching of the α process and the von Schweidler law, can be explained by the existence of those spatial structure. In the equilibrium system, however, those heterogeneities must be difficult to be observed since their sizes and magnitude are quite small compared to those in the nonequilibrium system. .

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