Effect of plasma absorption on dust lattice waves in hexagonal dust crystals

Kerong HE (何科荣); Hui CHEN (陈辉); Sanqiu LIU (刘三秋)

doi:10.1088/2058-6272/aaaadb

Plasma Science and Technology > 2018 > 20(4): 45001-045001. > DOI: 10.1088/2058-6272/aaaadb

Kerong HE (何科荣), Hui CHEN (陈辉), Sanqiu LIU (刘三秋). Effect of plasma absorption on dust lattice waves in hexagonal dust crystals[J]. Plasma Science and Technology, 2018, 20(4): 45001-045001. DOI: 10.1088/2058-6272/aaaadb

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Effect of plasma absorption on dust lattice waves in hexagonal dust crystals

1 Department of Materials Science and Engineering, Nanchang University, Nanchang 330031, People's Republic of China 2 Jiangxi Province Key Laboratory of Fusion and Information Control, Nanchang 330031, People’s Republic of China 3 Department of Science, Jiangxi University of Technology, Nanchang 330098, People?s Republic of China 4 Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Nos. 11247016, 11763006 and 11705080), the International S&T Cooperation Program of China (No. 2015DFA61800), the Natural Science Foundation of JiangXi Province (Nos. 2014ZBAB202001, 20151BAB212010, 20151BAB202023 and 2015ZBAB202006), and the Natural Science Foundation of JiangXi University of Technology (No. ZR15YB09).

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Received Date: July 16, 2017

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Abstract

Abstract

In the present paper, the effect of plasma absorption on lattice waves in 2D hexagonal dust crystals is investigated. The dispersion relations with the effect of plasma absorption are derived. It is found that the temperature effect (electron-to-ion temperature ratio τ) enhances the frequency of the dust lattice waves, while the spatial effect (dimensionless Debye shielding parameter k) weakens the frequency of the dust lattice waves. In addition, the system stabilities under the conditions of plasma absorption are studied. It is found that the temperature effect narrows the range of instability, while the spatial effect extends this range. And the range of instability is calculated, i.e. the system will always in the stable state regardless of the value of k˜ when τ >3.5. However, the system will be unstable when τ=1 and k˜ > 4.1.
- plasma absorption,
- dust lattice waves,
- hexagonal crystal

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References (34)

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