Issue |
Europhys. Lett.
Volume 48, Number 6, December 1999
|
|
---|---|---|
Page(s) | 662 - 666 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i1999-00535-4 | |
Published online | 01 September 2002 |
The non-exponential relaxation of the crystal around glass transition temperature
1
National Laboratory of Solid State Microstructures, Institute for Solid State Physics, Center for Advanced Studies in Science and Technology of Microstructures, Department of Physics, Nanjing University - Nanjing 210093, PRC
2
Center of Advanced Studies, Tsinghua University - Beijing 100084, PRC
Received:
28
April
1999
Accepted:
11
October
1999
A model of the energy barrier of a molecule between two orientational states in the crystal, which depends on the neighboring molecules, is first proposed. Based on this model, the orientational relaxation of molecules around 90 K was simulated with the Monte Carlo method. The simulation results show that the relaxation is slightly non-exponential and can fit the Kohlrausch-Williams-Watts (KWW) function with the non-exponential factor , which is equal to the experimental data that has not been explained before.
PACS: 64.70.Pf – Glass transitions / 61.48.+c – Fullerenes and fullerene-related materials / 02.50.Ng – Distribution theory and Monte Carlo studies
© EDP Sciences, 1999
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