Phonon spectra of two-dimensional liquid dusty plasmas on a one-dimensional periodic substrate

作     者：W. Li D. Huang K. Wang 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：063203-063203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：We investigate the phonon spectra of two-dimensional liquid dusty plasmas on a one-dimensional periodic substrate using numerical simulations. The propagation of the waves across the potential wells of the substrate is inhibited due to the confinement of the dust particles by the substrate minima. If the substrate wells are narrow or deep, one-dimensional chains of particles are formed in each minimum, and the longitudinal motion of an individual chain dominates the propagation of waves along the potential wells of the substrate. Increasing the width or decreasing the depth of the substrate minima allows the particles to buckle into a zigzag structure, and the resulting spectra develop two branches, one for sloshing motion and one for breathing motion. The repulsion between neighboring dust particles produces backward propagation of the sloshing wave for small wave numbers.