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Self-propelled motion of an extra particle in a two-dimensional plasma crystal

Laut, Ingo and Räth, Christoph and Zhdanov, Sergey and Nosenko, Volodymyr and Morfill, Gregor E. and Thomas, Hubertus M. (2017) Self-propelled motion of an extra particle in a two-dimensional plasma crystal. DPG spring meeting Dresden 2017, 19.-24. März 2017, Dresden.

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Plasma crystals consist of charged microparticles that levitate in a weakly ionized gas. In these nonequilibrium systems the particle interaction is nonreciprocal due to flowing ions. Plasma crystals were successfully used to study dynamical effects in liquids and solids at the kinetic level and have the potential to also enable the study of active particles. Here, we analyze in simulations and theory the self-propelled motion of an "extra" particle in a two-dimensional plasma crystal. Experimental observations [1] showed that the extra particle is confined in a channel of two neighboring rows of particles and moves persistently through the crystal. We use the simple model of a pointlike ion wake charge to reproduce this intriguing effect in simulations. We show that the nonreciprocity of the particle interaction, owing to the plasma flow, is responsible for a broken symmetry of the channel that enables the self-propelled motion of the extra particle [2]. [1] C.-R. Du, V. Nosenko, S. Zhdanov, H. M. Thomas, and G. E. Morfill, Phys. Rev. E 89, 021101(R) (2014) [2] I. Laut, C. Räth, S. K. Zhdanov, V. Nosenko, G. E. Morfill, and H. M. Thomas, accepted for publication in Phys. Rev. Lett.

Item URL in elib:https://elib.dlr.de/111809/
Document Type:Conference or Workshop Item (Speech)
Title:Self-propelled motion of an extra particle in a two-dimensional plasma crystal
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Morfill, Gregor E.max-planck-institut für extraterrestrische physik, giessenbachstrasse, 85748 garching, germanyUNSPECIFIEDUNSPECIFIED
Thomas, Hubertus M.UNSPECIFIEDhttps://orcid.org/0000-0001-8358-2023UNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:complex plasma, self-propelled motion, active matter
Event Title:DPG spring meeting Dresden 2017
Event Location:Dresden
Event Type:international Conference
Event Dates:19.-24. März 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Komplexe Plasmen / Data analysis (old), R - Komplexe Plasmen / Theory, Simulation (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Laut, Ingo
Deposited On:18 Apr 2017 10:31
Last Modified:29 Mar 2023 00:32

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