Abstract:
This review is based on a talk by the authors at the field Scientific session of the Physical Sciences Division of the Russian Academy of Sciences devoted to the 60th anniversary of the Vereshchagin Institute for High Pressure Physics of the Russian Academy of Sciences. The dependence of phase-diagram characteristics and phase transitions on the shape of the intermolecular potential is reviewed and analyzed for two- and three-dimensional systems with isotropic interaction. First, the case of monotonic repulsive and attractive parts of the potential is considered. In particular, it is demonstrated that if the width of the attractive part decreases, the critical point can disappear and even go under the melting curve. In the main part of the review, three-dimensional systems with potentials having a negative curvature in the repulsive region, that is, with two spatial scales in this region, are discussed in detail: in this case, a number of crystalline phases can occur, as can maxima on the melting curve, water-like anomalies, and liquid–liquid transitions. The dependence of the melting scenario on the shape of the potential in two-dimensional systems is also discussed.
The work was supported from the Russian Science Foundation (grant no. 19-12-00092), and from the Russian Foundation for Basic Research (grant no. 18-02-00981).
Received:August 15, 2018 Revised:December 6, 2019 Accepted: January 15, 2020
Citation:
V. N. Ryzhov, E. E. Tareyeva, Yu. D. Fomin, E. N. Tsiok, “Complex phase diagrams of systems with isotropic potentials: results of computer simulations”, UFN, 190:5 (2020), 449–473; Phys. Usp., 63:5 (2020), 417–439
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