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Title: Microscopic Theory of Heterogeneity and Nonexponential Relaxations in Supercooled Liquids

Abstract

Recent experiments show that supercooled liquids around the glass transition temperature are {open_quotes}dynamically heterogeneous{close_quotes} [H. Sillescu, J.Non-Cryst.Solids 243, 81 (1999)]. 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{sup {minus}(t/{tau}{sub KWW}){sup {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.

Authors:
;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40204628
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 86; Journal Issue: 24; Other Information: DOI: 10.1103/PhysRevLett.86.5526; Othernumber: PRLTAO000086000024005526000001; 024124PRL; PBD: 11 Jun 2001; Journal ID: ISSN 0031-9007
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GLASS; RELAXATION; RESPONSE FUNCTIONS; TRANSITION TEMPERATURE

Citation Formats

Xia, Xiaoyu, and Wolynes, Peter G. Microscopic Theory of Heterogeneity and Nonexponential Relaxations in Supercooled Liquids. United States: N. p., 2001. Web. doi:10.1103/PhysRevLett.86.5526.
Xia, Xiaoyu, & Wolynes, Peter G. Microscopic Theory of Heterogeneity and Nonexponential Relaxations in Supercooled Liquids. United States. doi:10.1103/PhysRevLett.86.5526.
Xia, Xiaoyu, and Wolynes, Peter G. Mon . "Microscopic Theory of Heterogeneity and Nonexponential Relaxations in Supercooled Liquids". United States. doi:10.1103/PhysRevLett.86.5526.
@article{osti_40204628,
title = {Microscopic Theory of Heterogeneity and Nonexponential Relaxations in Supercooled Liquids},
author = {Xia, Xiaoyu and Wolynes, Peter G},
abstractNote = {Recent experiments show that supercooled liquids around the glass transition temperature are {open_quotes}dynamically heterogeneous{close_quotes} [H. Sillescu, J.Non-Cryst.Solids 243, 81 (1999)]. 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{sup {minus}(t/{tau}{sub KWW}){sup {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.},
doi = {10.1103/PhysRevLett.86.5526},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 24,
volume = 86,
place = {United States},
year = {2001},
month = {6}
}