Mixing effects for the structural relaxation in binary hard-sphere liquids
Soft Condensed Matter
2007-05-23 v1 Statistical Mechanics
Abstract
We report extensive molecular-dynamics simulation results for binary mixtures of hard spheres for different size disparities and different mixing percentages,for packing fractions up to 0.605 and over a characteristic time interval spanning up to five orders in magnitude. We explore the changes in the evolution of glassy dynamics due to mixing and discover two opposite scenarios: for large size disparity, increasing the mixing percentage of small particles leads to a speed-up of long-time dynamics, while small disparity leads to a slowing down. These results agree with predictions based on the mode coupling theory for ideal glass transitions.
Cite
@article{arxiv.cond-mat/0303652,
title = {Mixing effects for the structural relaxation in binary hard-sphere liquids},
author = {G. Foffi and W. Gotze and F. Sciortino and P. Tartaglia and Th. Voigtmann},
journal= {arXiv preprint arXiv:cond-mat/0303652},
year = {2007}
}
Comments
4 pages, 3 figures