Fluctuating Mobility Generation and Transport in Glasses

Abstract

In the context of the random first order transition theory we use an extended mode coupling theory of the glass transition that includes activated events to account for spatiotemporal structures in aging and rejuvenating glasses. We numerically solve fluctuating dynamical equations for mobility and fictive temperature fields which capture both mobility generation through activated events and facilitation effects. Upon rejuvenating, a source of high mobility at a glass surface initiates a growth front of mobility which propagates into the unstable low mobility region. The speed of the front is consistent with experiments on the rejuvenation of stable glasses, which "melt" from their surface.

4 pages, 2 figures

References in corpus (6)

• Glassy dynamics of kinetically constrained models
• Inhomogeneous Mode-Coupling Theory and Growing Dynamic Length in Supercooled Liquids
• On the surface of glasses
• On the Strength of Glasses
• Manifestations of Dynamical Facilitation in Glassy Materials
• Random Diffusion Model

Cited by in corpus (7)

• Model Vapor-Deposited Glasses: Growth Front and Composition Effects
• Thermal stability of vapor-deposited stable glasses of an organic semiconductor
• Theory of the Structural Glass Transition: A Pedagogical Review
• Density controls the kinetic stability of ultrastable glasses
• The melting of stable glasses is governed by nucleation-and-growth dynamics
• Front propagation versus bulk relaxation in the annealing dynamics of a kinetically constrained model of ultrastable glasses
• Front propagation in ultrastable glasses is dynamically heterogeneous