Structures and diffusion of two-dimensional dusty plasmas on one-dimensional periodic substrates

作     者：Kang Wang Wei Li Dong Huang C. Reichhardt C. J. O. Reichhardt M. S. Murillo Yan Feng 

作者机构：Center for Soft Condensed Matter Physics and Interdisciplinary Research School of Physical Science and Technology Soochow University Suzhou 215006 China Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Department of Computational Mathematics Science and Engineering Michigan State University East Lansing Michigan 48824 USA 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2018年第98卷第6期

页      面：063204-063204页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：1000 Youth Talents Plan U.S. Department of Energy, USDOE National Natural Science Foundation of China, NSFC, (11505124) National Natural Science Foundation of China, NSFC Soochow University Six Talent Peaks Project in Jiangsu Province 

主　　题：Dusty or complex plasma Plasma crystals Strongly-coupled plasmas 

摘      要：Using numerical simulations, we examine the structure and diffusion of a two-dimensional dusty plasma (2DDP) in the presence of a one-dimensional periodic substrate (1DPS) as a function of increasing substrate strength. Both the pair correlation function perpendicular to the substrate modulation and the mean-squared displacement (MSD) of dust particles are calculated. It is found that both the structure and dynamics of 2DDP exhibit strong anisotropic effects, due to the applied 1DPS. As the substrate strength increases from zero, the structure order of dusty plasma along each potential well of 1DPS increases first probably due to the competition between the interparticle interactions and the particle-substrate interactions, and then decreases gradually, which may be due to the reduced dimensionality and the enhanced fluctuations. The obtained MSD along potential wells of 1DPS clearly shows three processes of diffusion in our studied 2DDP. Between the initial ballistic and finally diffusive motion, there is the intermediate subdiffusion discovered here, which may result from the substrate-induced distortion of the caging dynamics.