Diffusivity and configurational entropy maxima in short range attractive colloids
arXiv:cond-mat/0404604 · doi:10.1088/0953-8984/17/12/L02
Abstract
We study tagged particle diffusion at large packing fractions, for a model of particles interacting with a generalized Lennard-Jones 2n-n potential, with large n. The resulting short-range potential mimics interactions in colloidal systems. In agreement with previous calculations for short-range potential, we observe a diffusivity maximum as a function of temperature. By studying the temperature dependence of the configurational entropy -- which we evaluate with two different methods -- we show that a configurational entropy maximum is observed at a temperature close to that of the diffusivity maximum. Our findings suggest a relationbetween dynamics and number of distinct states for short-range potentials.
4 pages, 3 figures, submited to Physical Review Letter
References in corpus (9)
- Higher order glass-transition singularities in colloidal systems with attractive interactions
- Reentrant glass transition in a colloid-polymer mixture with depletion attractions
- Configurational Entropy and Diffusivity of Supercooled Water
- Glasses in hard spheres with short-range attraction
- Comparative simulation study of colloidal gels and glasses
- On the stationary points of the TAP free energy
- Confirmation of Anomalous Dynamical Arrest in attractive colloids: a molecular dynamics study
- Simulation study of Non-ergodicity Transitions: Gelation in Colloidal Systems with Short Range Attractions
- Thermodynamics of binary mixture glasses
Cited by in corpus (9)
- Perspective: Configurational entropy of glass-forming liquids
- The ideal glass transition of Hard Spheres
- Pressure-energy correlations in liquids. V. Isomorphs in generalized Lennard-Jones systems
- Configurational entropy of hard spheres
- Does the Adam-Gibbs relation hold in simulated supercooled liquids?
- Configurational entropy of polydisperse supercooled liquids
- Light diffusion and localization in 3D nonlinear disordered media
- Non-Gaussian energy landscape of a simple model for strong network-forming liquids: accurate evaluation of the configurational entropy
- Experimental Determination of Configurational Entropy in a Two-Dimensional Liquid under Random Pinning