PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Effect of the number of defect particles on the structure and dispersion relation of a two-dimensional dust lattice system |
Rangyue Zhang(张壤月)1, Guannan Shi(史冠男)2, Hanyu Tang(唐瀚宇)1, Yang Liu(刘阳)1, Yanhong Liu(刘艳红)3, and Feng Huang(黄峰)1,† |
1 College of Science, China Agricultural University, Beijing 100083, China; 2 College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China; 3 School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China |
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Abstract The effect of the number of defect particles on the structure and dispersion relations of a two-dimensional (2D) dust lattice is studied by molecular dynamics (MD) simulation. The dust lattice structures are characterized by particle distribution, nearest neighbor configuration and pair correlation function. The current autocorrelation function, the dispersion relation and sound speed are used to represent the wave properties. The wave propagation of the dust lattice closely relates to the lattice structure. It shows that the number of defect particles can affect the dust lattice local structure and then affect the dispersion relations of waves propagating in it. The presence of defect particles has a greater effect on the transverse waves than on the longitudinal waves of the dust lattice. The appropriate number of defect particles can weaken the anisotropy property of the lattice.
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Received: 01 June 2021
Revised: 13 October 2021
Accepted manuscript online: 18 October 2021
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PACS:
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52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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52.65.Yy
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(Molecular dynamics methods)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12075315 and 11675261). |
Corresponding Authors:
Feng Huang
E-mail: huangfeng@cau.edu.cn
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Cite this article:
Rangyue Zhang(张壤月), Guannan Shi(史冠男), Hanyu Tang(唐瀚宇), Yang Liu(刘阳), Yanhong Liu(刘艳红), and Feng Huang(黄峰) Effect of the number of defect particles on the structure and dispersion relation of a two-dimensional dust lattice system 2022 Chin. Phys. B 31 035204
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