Dynamical Crossover in Supercritical Core-Softened Fluids

TL;DR

This study investigates the complex dynamical crossover behavior in supercritical core-softened fluids, revealing that the crossover line exhibits intricate features due to the quasi-binary nature of these systems.

Contribution

First analysis of supercritical behavior in core-softened fluids, demonstrating the complex dynamical crossover line using multiple criteria.

Findings

Good agreement between different criteria for crossover line

Crossover line exhibits complex behavior due to quasi-binary nature

Dynamical crossover occurs in supercritical core-softened systems

Abstract

It is well known that some liquids can demonstrate anomalous behavior. Interestingly, this be- havior can be qualitatively reproduced with simple core-softened isotropic pair-potential systems. Although anomalous properties of liquids usually take place at low and moderate temperatures it was recently recognized that many important phenomena can appear in supercritical fuids. However, no studies of supercritical behavior of core-softened fuids is reported. This paper reports a study of dynamical crossover in supercritical core-softened systems. The crossover line is calculated from three different criteria and good agreement between them is observed. It is found that the behavior of the dynamical crossover line of core-softened systems is quite complex due to its quasi-binary nature.