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Core-softened potentials, multiple liquid–liquid critical points, and density anomaly regions: An exact solution |
Eduardo O. Rizzatti1, Marco Aurélio A. Barbosa2(), Marcia C. Barbosa1() |
1. Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre-RS, Brazil 2. Programa de Pós-Graduacão em Ciência de Materiais, Universidade de Brasília, Planaltina-DF, Brazil |
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Abstract The pressure versus temperature phase diagram of a system of particles interacting through a multiscale shoulder-like potential is exactly computed in one dimension. The N-shoulder potential exhibits N density anomaly regions in the phase diagram if the length scales can be connected by a convex curve. The result is analyzed in terms of the convexity of the Gibbs free energy.
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Keywords
density anomalies regions
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Corresponding Author(s):
Marco Aurélio A. Barbosa,Marcia C. Barbosa
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Issue Date: 30 October 2017
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