Slow dynamics in glass-forming materials

Frederic Affouard (1) , Patrice Bordat , Adrien Lerbret (2) , Marc Descamps (1)

1 LDSMM - Laboratoire de dynamique et structure des matériaux moléculaires
2 Cornell University [New York]

Dynamical properties of glass-formers such as glassy crystals, molecular liquids and model atomic liquids have been investigated in the ps-ns regime with dl_poly in order to check the Mode-Coupling Theory and the Coupling Model. The microscopic origin of the fragility, the characteristic parameter involved in the liquid-glass transition, is also highlighted: the interaction potential, especially its anharmonicity and capacity for intermolecular coupling, is the key parameter controlling both the long time dynamics in supercooled systems and the short time dynamics in their glassy states.

Mots clés: Physical Sciences

Frederic Affouard, Patrice Bordat, Adrien Lerbret, Marc Descamps. Slow dynamics in glass-forming materials. Molecular Simulation, 2007, 32 (12-13), pp.1057-1068. ⟨10.1080/08927020600900329⟩. ⟨hal-00514999⟩