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Dynamics in binary complex (dusty) plasmas

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Abstract

Binary complex plasmas consist not only plasma components including electrons, ions and neutrals but also mesoscopic solid particles of two types in terms of size and material. The particles acquire negative charges on their surface and the values strongly depend on their size. In binary complex plasmas, the electrostatic interparticle interaction is not uniform. Generally speaking, two types of particles can either mix or separate within the experiment time scale, characterized by the nonadditivity parameter. Force imbalance may also contribute to promoting phase separation. The review is sectioned into two parts. In the first part, experiments and simulations for the phase-separated three-dimensional complex plasmas under microgravity conditions are introduced. We discuss the critical conditions for phase separation, lane formation during the process of phase separation, and phenomena in the vicinity of the interface of a phase-separated complex plasma. In the second part, experiments and simulations for the mixed (quasi-)two-dimensional complex plasmas suspended in the sheath are introduced. The screening Coulomb interaction is modified due to the presence of the wakefield, leading to nonreciprocal interaction if particles are not exactly levitated in a layer. The dependence of the slow dynamics on the local structure in the disordered binary complex plasmas is introduced. The thermodynamical properties in the two-dimensional complex plasmas are addressed.

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Notes

  1. Note that for some scenarios such as two-stream instability, the plasma cannot be simply treated as a background. The charged species in the plasma and microparticles should be considered cooperatively (Winske et al. 1999; Quest et al. 2020).

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Acknowledgements

The authors acknowledge the support from National Natural Science Foundation of China (NSFC) no. 12035003 and 12975073.

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Correspondence to Cheng-Ran Du.

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Jiang, K., Du, CR. Dynamics in binary complex (dusty) plasmas. Rev. Mod. Plasma Phys. 6, 23 (2022). https://doi.org/10.1007/s41614-022-00083-3

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  • DOI: https://doi.org/10.1007/s41614-022-00083-3

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