Phase behavior of a fluid with competing attractive and repulsive interactions

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dc.creatorArcher, Andrew J.
dc.creatorWilding, Nigel B.
dc.date2007-06-05
dc.date.accessioned2026-07-07T10:03:06Z
dc.date.available2026-07-07T10:03:06Z
dc.descriptionFluids in which the interparticle potential has a hard core, is attractive at moderate separations, and repulsive at greater separations are known to exhibit novel phase behavior, including stable inhomogeneous phases. Here we report a joint simulation and theoretical study of such a fluid, focusing on the relationship between the liquid-vapor transition line and any new phases. The phase diagram is studied as a function of the amplitude of the attraction for a certain fixed amplitude of the long ranged repulsion. We find that the effect of the repulsion is to substitute the liquid-vapor critical point and a portion of the associated liquid-vapor transition line, by two first order transitions. One of these transitions separates the vapor from a fluid of spherical liquidlike clusters; the other separates the liquid from a fluid of spherical voids. At low temperature, the two transition lines intersect one another and a vapor-liquid transition line at a triple point. While most integral equation theories are unable to describe the new phase transitions, the Percus Yevick approximation does succeed in capturing the vapor-cluster transition, as well as aspects of the structure of the cluster fluid, in reasonable agreement with the simulation results.
dc.description15 pages, 20 figures
dc.identifierhttps://arxiv.org/abs/0706.0618
dc.identifierhttp://arxiv.org/abs/0706.0618
dc.identifierPhys. Rev. E 76, 031501 (2007)
dc.identifierdoi:10.1103/PhysRevE.76.031501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169162
dc.subjectSoft Condensed Matter
dc.subjectStatistical Mechanics
dc.titlePhase behavior of a fluid with competing attractive and repulsive interactions
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