Publication : t09/225

Dynamical Heterogeneity in Lattice Glass Models

Richard K. Darst (Department of Chemistry, Columbia University 3000 Broadway, New York, NY 10027, USA)
Reichman D.R. (Department of Chemistry, Columbia University 3000 Broadway, New York, NY 10027, USA)
Biroli G. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Abstract:
In this paper we consider in detail the properties of dynamical heterogeneity in lattice glass models (LGMs). LGMs are lattice models whose dynamical rules are based on thermodynamic, as opposed to purely kinetic, considerations. We devise a LGM that is not prone to crystallization and displays properties of a fragile glass-forming liquid. Particle motion in this model tends to be locally anisotropic on intermediate time scales even though the rules governing the model are isotropic. The model demonstrates violations of the Stokes-Einstein relation and the growth of various length scales associated with dynamical heterogeneity. We discuss future avenues of research comparing the predictions of lattice glass models and kinetically constrained models to atomistic systems.
Année de publication : 2010
Revue : J. Chem. Phys. 132 044510 (2010)
DOI : 10.1063/1.3298877
Preprint : arXiv:0911.0479
Langue : Anglais

Fichier(s) à télécharger :
  • JChemPhys_132_044510.pdf
  • publi.pdf

  •  

    Retour en haut