Diffusivity and configurational entropy maxima in short range attractive colloids
摘要
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.
引用
@article{arxiv.cond-mat/0404604,
title = {Diffusivity and configurational entropy maxima in short range attractive colloids},
author = {Luca Angelani and Giuseppe Foffi and Francesco Sciortino and Piero Tartaglia},
journal= {arXiv preprint arXiv:cond-mat/0404604},
year = {2007}
}
备注
4 pages, 3 figures, submited to Physical Review Letter