Bulk and shear relaxation in glasses and highly viscous liquids

Abstract

The ratio between the couplings of a relaxational process to compression and shear, respectively, is calculated in the Eshelby picture of structural rearrangements within a surrounding elastic matrix, assuming a constant density of stable structures in distortion space. The result is compared to experimental data for the low-temperature tunneling states in glasses and to Prigogine-Defay data at the glass transition from the literature.

6 pages, 2 figures, 53 references; version after understanding the Prigogine-Defay ratio at the glass transition in the accompanying paper arXiv:1203.3555 [cond-mat.dis-nn]

References in corpus (4)

• Do Athermal Amorphous Solids Exist?
• An asymmetry model for the highly viscous flow
• On the mechanism of the highly viscous flow
• An atomic mechanism for the boson peak in metallic glasses

Cited by in corpus (3)

• Elastically Cooperative Activated Barrier Hopping Theory of Relaxation in Viscous Fluids. I. General Formulation and Application to Hard Sphere Fluids
• Model for the alpha and beta shear-mechanical properties of supercooled liquids and its comparison to squalane data
• A thermodynamic treatment of the glass transition