Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00174 : Water-like Anomalous Properties and Polyamorphism in a Liquid with Smooth (Differentiable) Pair Interactions
Author:
We perform molecular dynamics simulations of a system of
particles interacting via a spherically symmetric, core-
softened pair potential, which is a smooth version of the (non-
differentiable) Jagla pair potential. Although liquid
properties are extremely sensitive to the details of the pair
interactions, we show that the smooth version of the Jagla
potential preserves the main properties of the original model.
Specifically, both pair potentials result in liquids that show
(i) water-like thermodynamic and dynamical anomalous
properties, as well as (ii) liquid and (iii) glass polymorphism
(i.e., the presence of more than one liquid and glass form,
respectively). The pressure-temperature phase diagram of our
smooth potential shows, as observed in computer simulations
using the Jagla model, a liquid-liquid first order transition
line separating two liquid phases and ending in a critical
point; such a critical point being accessible in equilibrium
simulations.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.174
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