A model for the fragile-to-strong transition in water

Abstract

A model based on the existence of two different competing local structures in water is described. It is shown that it can explain the transition between fragile and strong behavior that supercooled water has around 220 K. The high temperature behavior is similar to that observed in standard fragile glass-formers. The strong behavior at low temperatures is associated with the existence of a remanent configurational entropy coming from the possibility of locally choosing between the two possible environments.

Five pages, three figures

References in corpus (4)

• Static and Dynamic Properties of a Viscous Silica Melt Molecular Dynamics Computer Simulations
• Core-softened potentials and the anomalous properties of water
• Phase behavior of a system of particles with core collapse
• Liquid State Anomalies for the Stell-Hemmer Core-Softened Potential

Cited by in corpus (4)

• Relation Between the Widom line and the Strong-Fragile Dynamic Crossover in Systems with a Liquid-Liquid Phase Transition
• Effect of water-wall interaction potential on the properties of nanoconfined water
• Gaussian excitations model for glass-former dynamics and thermodynamics
• Fragile-strong transitions and polyamorphism in glass former fluids