|Título||Multiple liquid-liquid critical points and density anomaly in core-softened potentials
Barbosa, Marco Aurélio Alves
Torres, Evy Augusto Salcedo
Barbosa, Marcia Cristina Bernardes
|Abstract||The relation between liquid-liquid phase transitions andwaterlike density anomalies in core-softened potentials of fluids was investigated in an exactly solvable one-dimensional lattice model and in a three-dimensional fluid with a 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 the liquid-liquid phase transition and density anomaly.
|Contido em||Physical review. E, Statistical, nonlinear, and soft matter physics. Vol. 87, no. 3 (Mar. 2013), 032303, 5 p.
|Tipo||Artigo de periódico
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