We review the random first-order transition theory of the glass transition, emphasizing the experimental tests of the theory. Many distinct phenomena are quantitatively predicted or explained by the theory, both above and below the glass transition temperature Tg. These include the following: the viscosity catastrophe and heat-capacity jump at Tg, and their connection; the nonexponentiality of relaxations and their correlation with the fragility; dynamic heterogeneity in supercooled liquids owing to the mosaic structure; deviations from the Vogel-Fulcher law, connected with strings or fractal cooperative rearrangements; deviations from the Stokes-Einstein relation close to Tg; aging and its correlation with fragility; and the excess density of states at cryogenic temperatures owing to two-level tunneling systems and the Boson peak.
Annual Review of Physical Chemistry
- Pub Date:
- May 2007
- Condensed Matter - Disordered Systems and Neural Networks;
- Condensed Matter - Materials Science
- submitted to Ann. Rev. Phys. Chem