Fast dynamics in glass formers: Relation to fragility and the Kohlrausch exponent
- Naval Research Lab., Washington, DC (United States)
From the Raman spectra and related inferences from low temperature specific heat data, Sokolov and coworkers have established that the ratio of the quasielastic and vibrational contributions at low temperatures (5 {approximately} 10K) up to T{sub g} correlates well with the degree of fragility and {beta} of the glass-former. As pointed out by Sokolov (see his contribution in this Volume) such a correlation between the fast dynamics and structural {alpha}-relaxation at T{sub g} (i.e., m and {beta}) is intriguing, since at and below T{sub g}, the {alpha}-relaxation time {tau}{sub {alpha}} is more than twelve orders of magnitude longer than the quasielastic contribution and the boson peak. The authors show in this paper how the Coupling Model (CM) may provide an explanation for this correlation. 56 refs., 2 figs.
- Sponsoring Organization:
- Office of Naval Research, Washington, DC (United States)
- OSTI ID:
- 580854
- Report Number(s):
- CONF-961202--; ISBN 1-55899-359-2
- Country of Publication:
- United States
- Language:
- English
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