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arXiv 1104.3779physics.plasm-phcond-mat.soft
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尘埃等离子体中异常扩散和熔化的识别

Identifying anomalous diffusion and melting in dusty plasmas

Yan Feng, J. Goree, Bin Liu

摘要:

研究了二维Yukawa系统中液体的反常扩散和固-液相变(熔化)。自中间散射函数(自ISF),从模拟数据计算,表现出时间衰减,或松弛,与特征松弛时间。这种衰减被发现是有用的区分正常和异常扩散在液体中,并确定固-液相变。对于液体,发现弛豫时间与长度成比例,对于固-液相变,发现自ISF曲线的形状是相的灵敏指示器。摩擦对松弛的时间有显著影响,但对熔点没有影响。

英文摘要:

Anomalous diffusion in liquids and the solid-liquid phase transition (melting) are studied in two-dimensional Yukawa systems. The self-intermediate scattering function (self-ISF), calculated from simulation data, exhibits a temporal decay, or relaxation, with a characteristic relaxation time. This decay is found to be useful for distinguishing normal and anomalous diffusion in a liquid, and for identifying the solid-liquid phase transition. For liquids, a scaling of the relaxation time with length scale is found. For the solid-liquid phase transition, the shape of the self-ISF curve is found to be a sensitive indicator of phase. Friction has a significant effect on the timing of relaxation, but not the melting point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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