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http://hdl.handle.net/2445/18838
Title: | Liquid-liquid phase transition for an attractive isotropic potential with wide repulsive range |
Author: | Malescio, Gianpietro Franzese, Giancarlo Skibinsky, Anna Buldyrev, V. S. (Vladimir Sergeevich) Stanley, H. Eugene (Harry Eugene), 1941- |
Keywords: | Cristal·lografia Equacions d'estat Crystallography Equations of state |
Issue Date: | 2005 |
Publisher: | The American Physical Society |
Abstract: | We investigate how the phase diagram of a repulsive soft-core attractive potential, with a liquid-liquid phase transition in addition to the standard gas-liquid phase transition, changes by varying the parameters of the potential. We extend our previous work on short soft-core ranges to the case of large soft-core ranges, by using an integral equation approach in the hypernetted-chain approximation. We show, using a modified van der Waals equation we recently introduced, that if there is a balance between the attractive and repulsive part of the potential this potential has two fluid-fluid critical points well separated in temperature and in density. This implies that for the repulsive (attractive) energy U R ( U A ) and the repulsive (attractive) range w R ( w A ) the relation U R ∕ U A ∝ w R ∕ w A holds for short soft-core ranges, while U R ∕ U A ∝ 3 w R ∕ w A holds for large soft-core ranges. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.71.061504 |
It is part of: | Physical Review E, 2005, vol. 71, núm. 6, p. 061504-1-061504-8 |
URI: | http://hdl.handle.net/2445/18838 |
Related resource: | http://dx.doi.org/10.1103/PhysRevE.71.061504 |
ISSN: | 1063-651X |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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