Analysis of Diffusion Constant and Non-Gaussianity near the Glass Transition Point in the Frequency Domain
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- Tagawa Fumitaka
- Department of Physics, Kyushu University
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- Odagaki Takashi
- Department of Physics, Kyushu University
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- Matsui Jun
- Department of Physics, Kyushu University
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Abstract
A novel method is developed for estimating the diffusion constant Dc and the non-Gaussian parameter A(t) on the basis of measurement in the frequency region. This method is shown to have merits over the conventional one in which a limited time window is used. To confirm the validity of this method, it is applied to a binary soft-sphere fluid which was studied by molecular dynamics (MD) simulation. The diffusion constant Dc is determined in the region closer to the glass transition than in the conventional MD simulation. The temperature dependence of the exponent of A(t) is consistent with that predicted by the trapping diffusion model.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 74 (7), 1988-1991, 2005
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679164736128
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- NII Article ID
- 110001979655
- 130004539326
- 210000105542
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- NII Book ID
- AA00704814
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- BIBCODE
- 2005JPSJ...74.1988T
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7357011
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed