Identifying anomalous diffusion and melting in dusty plasmas

Details Identifying anomalous diffusion and melting in dusty plasmas Identifying anomalous diffusion and melting in dusty plasmas

2011-04-19

arxiv.org/abs/1104.3779v1

Physical Review E, Vol. 82, 036403 (2010)

Physics

Plasma Physics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevE.82.036403

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.

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