2010/05/31 by Jonathas Nunes da Silva, Evy Salcedo, da Silva, Jonathas Nunes +7
Chemistry · Earth and Planetary Sciences · Engineering · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials #FOS: Physical sciences #High-pressure geophysics and materials #Material Dynamics and Properties #Phase Equilibria and Thermodynamics #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech) #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.48550/arxiv.1006.0033
19 pages, 8 figures
arxiv created 2010/05/31 · openalex publication_date 2010/05/31 · arxiv updated 2010/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using molecular dynamic simulations we study a system of particles\ninteracting through a continuous core-softened potentials consisting of a hard\ncore, a shoulder at closest distances and an attractive well at further\ndistance. We obtain the pressure-temperature phase diagram of of this system\nfor various depths of the tunable attractive well. Since this is a two length\nscales potential, density, diffusion and structural anomalies are expected. We\nshow that the effect of increasing the attractive interaction between the\nmolecules is to shrink the region in pressure in which the density and the\ndiffusion anomalies are present. If the attractive forces are too strong,\nparticle will be predominantly in one of the two length scales and no density\nof diffusion anomaly is observed. The structural anomalous region is present\nfor all the cases.\n