Self-sustained non-equilibrium co-existence of fluid and solid states in a strongly coupled complex plasma system.

Autor: Hariprasad MG; Institute for Plasma Research, A CI of Homi Bhabha National Institute, Bhat, Gandhinagar, Gujarat, 382428, India. hari.prasad@ipr.res.in., Bandyopadhyay P; Institute for Plasma Research, A CI of Homi Bhabha National Institute, Bhat, Gandhinagar, Gujarat, 382428, India., Nikolaev VS; Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow Region, 141701, Russia.; Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412, Russia., Kolotinskii DA; Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow Region, 141701, Russia.; Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412, Russia., Arumugam S; Department of Physics, Sikkim Manipal Institute of Technology, Majitar, Sikkim, 737136, India., Arora G; Institute for Plasma Research, A CI of Homi Bhabha National Institute, Bhat, Gandhinagar, Gujarat, 382428, India., Singh S; Institute for Plasma Research, A CI of Homi Bhabha National Institute, Bhat, Gandhinagar, Gujarat, 382428, India., Sen A; Institute for Plasma Research, A CI of Homi Bhabha National Institute, Bhat, Gandhinagar, Gujarat, 382428, India., Timofeev AV; Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow Region, 141701, Russia.; Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412, Russia.; National Research University Higher School of Economics, Moscow, 123458, Russia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Aug 16; Vol. 12 (1), pp. 13882. Date of Electronic Publication: 2022 Aug 16.
DOI: 10.1038/s41598-022-17939-w
Abstrakt: A complex (dusty) plasma system is well known as a paradigmatic model for studying the kinetics of solid-liquid phase transitions in inactive condensed matter. At the same time, under certain conditions a complex plasma system can also display characteristics of an active medium with the micron-sized particles converting energy of the ambient environment into motility and thereby becoming active. We present a detailed analysis of the experimental complex plasmas system that shows evidence of a non-equilibrium stationary coexistence between a cold crystalline and a hot fluid state in the structure due to the conversion of plasma energy into the motion energy of microparticles in the central region of the system. The plasma mediated non-reciprocal interaction between the dust particles is the underlying mechanism for the enormous heating of the central subsystem, and it acts as a micro-scale energy source that keeps the central subsystem in the molten state. Accurate multiscale simulations of the system based on combined molecular dynamics and particle-in-cell approaches show that strong structural nonuniformity of the system under the action of electostatic trap makes development of instabilities a local process. We present both experimental tests conducted with a complex plasmas system in a DC glow discharge plasma and a detailed theoretical analysis.
(© 2022. The Author(s).)
Databáze: MEDLINE
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