Work

Decoupling of Self‐Diffusion and Structural Relaxation during a Fragile‐to‐Strong Crossover in a Kinetically Constrained Lattice Gas

Year: 2005

Type: article

Abstract: Decoupling crossover in glass formers: In normal liquids, the self-diffusion constant, Ds, and mean relaxation time, τα, are inversely proportional. However, in glass formers, Ds and τα are decoupled, and if fragile–strong crossovers exist, Dsτα versus temperature T can be non-monotonic. The authors illustrate such a decoupling theoretically using an asymmetry parameter b (see figure). A similar behavior is seen in experiment.

Source: ChemPhysChem

DOI: 10.1002/cphc.200400610

Authors: Albert C. Pan, Juan P. Garrahan, David Chandler

Institutions: University of California, Berkeley, University of Nottingham

Language: English

Topic: Material Dynamics and Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Engineering and Physical Sciences Research Council

Awards: "THORETICAL STUDIES OF ELECTRON TRANSFER IN COMPLEX MEDIA", G4955255717, G560148896