Phase Diagram of the Penetrable-Square-Well Model

0375805 - ÚCHP 2013 RIV FR eng J - Journal Article
Fantoni, R. - Malijevský, Alexandr - Santos, A. - Giacometti, A.
Phase Diagram of the Penetrable-Square-Well Model.
EPL. Roč. 93, č. 2 (2011), s. 26002. ISSN 0295-5075. E-ISSN 1286-4854
R&D Projects: GA AV ČR IAA400720710
Grant - others:PRIN-COFIN(ES) 2007B58EAB; MCI(ES) FIS2010-16587
Institutional research plan: CEZ:AV0Z40720504
Keywords : soft colloidal spheres * monte carlo simulations * penetrability
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.171, year: 2011

We study a system formed by soft colloidal spheres attracting each other via a square-well potential, using extensive Monte Carlo simulations of various nature. The softness is implemented through a reduction of the infinite part of the repulsive potential to a finite one. For sufficiently low values of the penetrability parameter we find the system to be Ruelle stable with square-well–like behavior. For high values of the penetrability the system is thermodynamically unstable and collapses into an isolated blob formed by a few clusters each containing many overlapping particles. For intermediate values of the penetrability the system has a rich phase diagram with a partial lack of thermodynamic consistency.
Permanent Link: http://hdl.handle.net/11104/0208368