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.
@article{arxiv.0706.2915,
title = {Interplay between structure and density anomaly for an isotropic core-softened ramp-like potential},
author = {Alan Barros de Oliveira and Paulo A. Netz and Marcia C. Barbosa},
journal= {arXiv preprint arXiv:0706.2915},
year = {2007}
}