Produção Nacional
Multiple liquid-liquid critical points and density anomaly in core-softened potentials
2013; American Physical Society; Volume: 87; Issue: 3 Linguagem: Inglês
10.1103/physreve.87.032303
ISSN1550-2376
AutoresMarco Aurélio A. Barbosa, Evy Salcedo, Márcia C. Barbosa,
Tópico(s)Quantum, superfluid, helium dynamics
ResumoThe 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.
Referência(s)