Phase diagram of the penetrable square well-model

Details Phase diagram of the penetrable square well-model Phase diagram of the penetrable square well-model

2011-01-04

arxiv.org/abs/1101.0708v1

EPL, 93 (2011) 26002

Physics

Condensed Matter

Soft Condensed Matter

6 pages and 5 figures

Scientific paper

10.1209/0295-5075/93/26002

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.

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