Mixing effects for the structural relaxation in binary hard-sphere liquids

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.

4 pages, 3 figures

References in corpus (2)

• Scaling behavior in the $\beta$-relaxation regime of a supercooled Lennard-Jones mixture
• Effect of Composition Changes on the Structural Relaxation of a Binary Mixture

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