Interplay between structure and density anomaly for an isotropic core-softened ramp-like potential

TL;DR

This study uses molecular dynamics and integral equations to explore how a core-softened ramp potential causes water-like density, structural, and dynamic anomalies, revealing potential origins of these anomalies.

Contribution

It introduces a detailed analysis of how a specific isotropic potential induces water-like anomalies in structure and dynamics, expanding understanding of anomalous fluids.

Findings

Density, dynamic, and structural anomalies similar to water are observed.

Radial distribution function analysis suggests a link to the origin of density anomaly.

The potential induces anomalies in an isotropic system, typically associated with water.

Abstract

Using molecular dynamics simulations and integral equations we investigate the structure, the thermodynamics and the dynamics of a system of particles interacting through a continuous core- softened ramp-like interparticle potential. We found density, dynamic and structural anomalies similar to that found in water. Analysis of the radial distribution function for several temperatures at fixed densities show a pattern that may be related to the origin of density anomaly.