Freezing of Polydisperse Hard Spheres

Details Freezing of Polydisperse Hard Spheres Freezing of Polydisperse Hard Spheres

1999-05-19

arxiv.org/abs/cond-mat/9905282v1

Physics

Condensed Matter

Statistical Mechanics

4 pages (including figures), tex in LaTeX, figures in eps format Submitted to Phys. Rev. Lett

Scientific paper

The fluid - crystal equilibria of polydisperse mixtures of hard spheres have been studied by computer simulation of the solid phase and using an accurate equation of state for the fluid. A new scheme has been developed to evaluate the composition of crystalline phases in equilibrium with a given polydisperse fluid. Some common assumptions in theoretical approaches and their results are discussed on the light of the simulation results. Finally, no evidence of the existence of a terminal polydispersity in the fluid phase is found for polydisperse hard spheres, the disagreement of this finding with previous molecular simulation results is explained in terms of the inherent limitations of some ways of modeling the chemical potential as a function of the particle size.

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