Micro-structural Fluctuations in 2D Dusty Plasma Liquids
- Department of Physics, National Central University, Jhong-Li, Taiwan, 32001 (China)
We address structural fluctuations in a cold 2D dusty plasma liquid which is self-organized through the strong Coulomb coupling of the negatively charged micro-meter sized dust particles suspending in weakly ionized discharges. The 2D liquids consist of triangular type ordered domains surrounded by defect clusters, which can be reorganized through avalanche type hopping under the interplay of strong Coulomb coupling and thermal fluctuations. The spatio-temporal evolutions of the local bond-orientational order are directly tracked through digital optical microscopy. The power law scaling of the temporal persistence length of fluctuations is obtained for the cold liquid. The measurement of the conditional probability of the persistence lengths of the successive fluctuating cycles suggests certain types of the persistence length combinations are more preferred. The memory of persistence lasts a few fluctuating cycles.
- OSTI ID:
- 21064157
- Journal Information:
- AIP Conference Proceedings, Vol. 922, Issue 1; Conference: ICNF 2007: 19. international conference on noise and fluctuations, Tokyo (Japan), 9-14 Sep 2007; Other Information: DOI: 10.1063/1.2759684; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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