Dynamical heterogeneities of cold 2D Yukawa liquids

作者：Wang, Kang; Huang, Dong; Feng, Yan^*

来源：Journal of Physics D: Applied Physics , 2018, 51(24): 245201.

DOI：10.1088/1361-6463/aac344

• Yukawa liquid
• dusty plasma
• Langevin dynamical simulation
• dynamical heterogeneities

Dynamical heterogeneities of 2D liquid dusty plasmas at different temperatures are investigated systematically using Langevin dynamical simulations. From the simulated trajectories, various heterogeneity measures have been calculated, such as the distance matrix, the averaged squared displacement, the non-Gaussian parameter, and the four-point susceptibility. It is found that, for 2D Yukawa liquids, both spatial and temporal heterogeneities in dynamics are more severe at a lower temperature near the melting point. For various temperatures, the calculated non-Gaussian parameter of 2D Yukawa liquids contains two peaks at different times, indicating the most heterogeneous dynamics, which are attributed to the transition of different motions and the a relaxation time, respectively. In the diffusive motion, the most heterogeneous dynamics for a colder Yukawa liquid happen more slowly, as indicated by both the non-Gaussian parameter and the four-point susceptibility.

• 出版日期2018-6-20
• 单位苏州大学