Anomalous temperature dependence of diffusion in crystals in time-periodic external fields
Anomalous temperature dependence of diffusion in crystals in time-periodic external fields
复制标题
时间周期外部场中晶体扩散的反常温度依赖性
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
I. Marchenko
中科院分区：
文献类型：
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作者：
I. Marchenko;I. Marchenko
本文用计算机模拟的方法研究了在周期外力作用下晶格中粒子的扩散特性。研究表明，扩散系数的温度依赖性是异常的。在某些温度区间内，扩散可以随着温度的降低而增加。这些间隔的位置和宽度取决于外场的频率。已经发现，在存在周期性外场的情况下的扩散系数可以比相同温度下的通常扩散系数大九个数量级以上。分析了这种异常的物理原因。
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.