Viscoelastic properties of attractive and repulsive colloidal glasses
arXiv:cond-mat/0410354 · doi:10.1088/0953-8984/17/25/L05
Abstract
We report a numerical study of the shear viscosity and the frequency dependent elastic moduli close to dynamical arrest for a model of short-range attractive colloids, both for the repulsive and the attractive glass transition. Calculating the stress autocorrelation functions, we find that density fluctuations of wavevectors close to the first peak in the structure factor control the viscosity rise on approaching the repulsive glass, while fluctuations of larger wavevectors control the viscosity close to the attractive glass. On approaching the glass transition, the viscosity diverges with a power law with the same exponent as the density autocorrelation time.
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- Yield Stress Materials in Soft Condensed Matter
- The Physics of the Colloidal Glass Transition
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- Gel to glass transition in simulation of a valence-limited colloidal system
- Replica theory of the rigidity of structural glasses
- Viscoelasticity and Stokes-Einstein relation in repulsive and attractive colloidal glasses
- The influence of bond-rigidity and cluster diffusion on the self-diffusion of hard spheres with square-well interaction
- Aging in attraction-driven colloidal glasses
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- Statistical Mechanics of Time Independent Non-Dissipative Nonequilibrium States
- Dynamical heterogeneities in an attraction driven colloidal glass
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- Viscoelasticity of a colloidal gel during dynamical arrest: evolution through the critical gel and comparison with a soft colloidal glass