Shear-transformation-zone theory of viscosity, diffusion, and stretched exponential relaxation in amorphous solids.

  title={Shear-transformation-zone theory of viscosity, diffusion, and stretched exponential relaxation in amorphous solids.},
  author={James Langer},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={85 5 Pt 1},
  • J. Langer
  • Published 1 February 2012
  • Materials Science
  • Physical review. E, Statistical, nonlinear, and soft matter physics
The shear-transformation-zone (STZ) theory has been remarkably successful in accounting for broadly peaked, frequency-dependent, viscoelastic responses of amorphous systems near their glass temperatures T_{g}. This success is based on the theory's first-principles prediction of a wide range of internal STZ transition rates. Here, I show that the STZ rate distribution causes the Newtonian viscosity to be strongly temperature dependent; and I propose that it is this temperature dependence, rather… 

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