Minimal model for beta relaxation in viscous liquids

Abstract

Contrasts between beta relaxation in equilibrium viscous liquids and glasses are rationalized in terms of a double-well potential model with structure-dependent asymmetry, assuming structure is described by a single order parameter. The model is tested for tripropylene glycol where it accounts for the hysteresis of the dielectric beta loss peak frequency and magnitude during cooling and reheating through the glass transition.

Phys. Rev. Lett. (in press)

References in corpus (4)

• The Excess Wing in the Dielectric Loss of Glass-Formers: A Johari-Goldstein beta-Relaxation?
• Time-temperature superposition in viscous liquids
• Beta-relaxation of non-polymeric liquids close to the glass transition
• Mechanical Relaxation in Glasses and at the Glass Transition

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