Volume 85, Number 3, February 2009
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||10 February 2009|
An ubiquitous mechanism for water-like anomalies
Universidade Federal do Rio Grande do Sul, Instituto de Física - 91501-970, Porto Alegre, RS, Brazil
2 Universidade Federal do Rio Grande do Sul, Instituto de Química - 91501-970, Porto Alegre, RS, Brazil
Corresponding author: firstname.lastname@example.org
Accepted: 11 January 2009
Using collision-driven molecular dynamics a system of spherical particles interacting through an effective two-length-scales potential is studied. The potential can be tuned by means of a single parameter, λ, from a ramp (λ = 0.5) to a square-shoulder potential (λ =1.0) representing a family of two-length-scales potentials in which the shortest interaction distance has higher potential energy than the largest interaction distance. For all the potentials, ranging between the ramp and the square-shoulder, density and structural anomalies were found, while the diffusion anomaly is found in all but in the square-shoulder potential. The presence of anomalies in square-shoulder potential, not observed in previous simulations, confirms the assumption that the two-length-scales potential is an ubiquitous ingredient for a system to exhibit water-like anomalies.
PACS: 61.20.Ja – Computer simulation of liquid structure / 61.25.Em – Molecular liquids / 65.20.-w – Thermal properties of liquids
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.