Phase behaviour of additive binary mixtures in the limit of infinite asymmetry

Details Phase behaviour of additive binary mixtures in the limit of infinite asymmetry Phase behaviour of additive binary mixtures in the limit of infinite asymmetry

1998-04-21

arxiv.org/abs/cond-mat/9804225v2

Phys. Rev. E 58, R4080 (1998)

Physics

Condensed Matter

Soft Condensed Matter

Full rewriting of the paper (also new title). 4 pages, LaTeX, uses revtex, multicol, epsfig, and amstex style files, to appear

Scientific paper

10.1103/PhysRevE.58.R4080

We provide an exact mapping between the density functional of a binary mixture and that of the effective one-component fluid in the limit of infinite asymmetry. The fluid of parallel hard cubes is thus mapped onto that of parallel adhesive hard cubes. Its phase behaviour reveals that demixing of a very asymmetric mixture can only occur between a solvent-rich fluid and a permeated large particle solid or between two large particle solids with different packing fractions. Comparing with hard spheres mixtures we conclude that the phase behaviour of very asymmetric hard-particle mixtures can be determined from that of the large component interacting via an adhesive-like potential.

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