Multiple liquid-liquid critical points and anomalies in core-softened potentials

Abstract

The relation between liquid-liquid phase transitions and waterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one dimensional lattice model and a in a three dimensional fluid with fermi-like potential, the latter by molecular dynamics. Both systems were shown to present three liquid phases, two liquid-liquid phase transitions closely connected to two distinct regions of anomalous density increase. We propose that an oscillatory behavior observed on the thermal expansion coefficient as a function of pressure can be used as a signature of the connection between liquid-liquid phase and density.

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Cited by in corpus (6)

• Waterlike anomalies in a 2D core-softened potential
• Residual entropy and waterlike anomalies in the repulsive one dimensional lattice gas
• Competing interactions near the liquid-liquid phase transition of core-softened water/methanol mixtures
• Density anomaly in water-alcohol mixtures: minimum model for structure makers and breakers
• Thermodynamic constraints and pseudotransition behavior in a one-dimensional water-like system
• Waterlike density anomaly in fermions