Anomalous diffusion producing normal relaxation and transport
From the Arrhenius law a probability distribution of timescales is derived by treating both the prefactor and the activation energy as random variables. In the defect-diffusion model this probability distribution is used to calculate the properties of the anomalous diffusion of defects. The timescal...
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Published in | Journal of physics. Condensed matter Vol. 19; no. 6; pp. 065121 - 065121 (7) |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
14.02.2007
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Online Access | Get full text |
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Summary: | From the Arrhenius law a probability distribution of timescales is derived by treating both the prefactor and the activation energy as random variables. In the defect-diffusion model this probability distribution is used to calculate the properties of the anomalous diffusion of defects. The timescales represent the pausing time distribution between movements of a defect. The conditions are determined for these mobile defects to produce stretched exponential relaxation. The diffusion of a single defect is anomalous, but the collective effect of all defects produces a characteristic relaxation timescale. The temperature and pressure dependence of this timescale is used to determine conductivity, dielectric relaxation, and viscosity. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0953-8984 1361-648X |
DOI: | 10.1088/0953-8984/19/6/065121 |