Slow dynamics in a primitive tetrahedral network model

Abstract

We report extensive Monte Carlo and event-driven molecular dynamics simulations of the fluid and liquid phase of a primitive model for silica recently introduced by Ford, Auerbach and Monson [J. Chem. Phys. 17, 8415 (2004)]. We evaluate the iso-diffusivity lines in the temperature-density plane to provide an indication of the shape of the glass transition line. Except for large densities, arrest is driven by the onset of the tetrahedral bonding pattern and the resulting dynamics is strong in the Angell's classification scheme. We compare structural and dynamic properties with corresponding results of two recently studied primitive models of network forming liquids -- a primitive model for water and a angular-constraint free model of four-coordinated particles -- to pin down the role of the geometric constraints associated to the bonding. Eventually we discuss the similarities between "glass" formation in network forming liquids and "gel" formation in colloidal dispersions of patchy particles.

9 pages, 10 figures

References in corpus (18)

• Phase diagram of patchy colloids: towards empty liquids
• Static and Dynamic Properties of a Viscous Silica Melt Molecular Dynamics Computer Simulations
• Fragile-to-strong transition and polyamorphism in the energy landscape of liquid silica
• High-quality continuous random networks
• Dynamics of simulated water under pressure
• Density minimum and liquid-liquid phase transition
• Model for reversible colloidal gelation
• Confirmation of Anomalous Dynamical Arrest in attractive colloids: a molecular dynamics study
• Scaling of dynamics with the range of interaction in short-range attractive colloids
• Supercooled Water and the Kinetic Glass Transition II: Collective Dynamics
• Evidence for Unusual Dynamical Arrest Scenario in Short Ranged Colloidal Systems
• Model for Assembly and Gelation of Four-Armed DNA Dendrimers
• Gel to glass transition in simulation of a valence-limited colloidal system
• Molecular mode-coupling theory for supercooled liquids: Application to water
• Topology of amorphous tetrahedral semiconductors on intermediate lengthscales
• Energy landscape of a simple model for strong liquids
• Non-Gaussian energy landscape of a simple model for strong network-forming liquids: accurate evaluation of the configurational entropy
• Mode-coupling theory predictions for a limited valency attractive square-well model

Cited by in corpus (17)

• Colloidal Gels: Equilibrium and Non-Equilibrium Routes
• Strong pressure-energy correlations in van der Waals liquids
• Theoretical and numerical study of the phase diagram of patchy colloids: ordered and disordered patch arrangements
• On the possibility of extending the Nore-Frenkel generalized law of correspondent states to non-isotropic patchy interactions
• Self-assembly of bi-functional patchy particles with anisotropic shape into polymers chains: theory and simulations
• Dynamical Behavior Near a Liquid-Liquid Phase Transition in Simulations of Supercooled Water
• Gel-forming patchy colloids and network glass formers: Thermodynamic and Dynamic analogies
• Dynamics and energy landscape in a tetrahedral network glass-former: Direct comparison with models of fragile liquids
• Phase diagram and structural properties of a simple model for one-patch particles
• Understanding tetrahedral liquids through patchy colloids
• Simulating Hard Rigid Bodies
• Properties of patchy colloidal particles close to a surface: a Monte Carlo and density functional study
• A spherical model with directional interactions: I. Static properties
• A test for the existence of isomorphs in glass-forming materials
• Optimizing Event-Driven Simulations
• Phonon transport properties of particulate physical gels
• Structural, mechanical, and vibrational properties of particulate physical gels