Anomalous temperature dependence of diffusion in crystals in time-periodic external fields |
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Authors: | Email author" target="_blank">I?G?MarchenkoEmail author I?I?Marchenko |
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Institution: | 1.National Science Center Kharkov Institute of Physics and Technology,Kharkov,Ukraine;2.National Technical University Kharkov Polytechnic Institute,Kharkov,Ukraine |
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Abstract: | The features of the diffusion of particles under the action of an external periodic force in a crystal lattice have been studied
using computer simulation. It has been shown that the temperature dependence of the diffusion coefficients is anomalous. Diffusion
can increase with a decrease in the temperature in some temperature intervals. The positions and widths of these intervals
depend on the frequency of the external field. It has been found that the diffusion coefficient in the presence of a periodic
external field can be more than nine orders of magnitude larger than the usual diffusion coefficient at the same temperature.
The physical reasons for this anomaly have been analyzed. |
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