Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-08-30
Physics
Condensed Matter
Disordered Systems and Neural Networks
4 pages including 3 eps figures
Scientific paper
10.1103/PhysRevLett.86.5526
Recent experiments and computer simulations show that supercooled liquids around the glass transition temperature are "dynamically heterogeneous" [1]. Such heterogeneity is expected from the random first order transition theory of the glass transition. Using a microscopic approach based on this theory, we derive a relation between the departure from Debye relaxation as characterized by the $\beta$ value of a stretched exponential response function $\phi(t) =e^{-(t/ \tau_{KWW})^{\beta}}$, and the fragility of the liquid. The $\beta$ value is also predicted to depend on temperature and to vanish as the ideal glass transition is approached at the Kauzmann temperature.
Wolynes Peter G.
Xia Xiaoyu
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