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  Microphysics of liquid complex plasmas in equilibrium and non-equilibrium systems

Piel, A., Block, D., Melzer, A., Mulsow, M., Schablinski, J., Schella, A., et al. (2018). Microphysics of liquid complex plasmas in equilibrium and non-equilibrium systems. The European Physical Journal D, 72(5): 80. doi:10.1140/epjd/e2017-80371-7.

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Piel, A., Author
Block, D., Author
Melzer, A., Author
Mulsow, M., Author
Schablinski, J., Author
Schella, André1, Author           
Wieben, F., Author
Wilms, J., Author
Affiliations:
1Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063299              

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 Abstract: The dynamic evolution of the microscopic structure of solid and liquid phases of complex plasmas is studied experimentally and by means of molecular dynamics (MD) simulations. In small finite systems, the cooperative motion can be described in terms of discrete modes. These modes are studied with different experimental approaches. Using diffuse scattered laser light, applying laser tweezer forces to individual particles, and periodic laser pulses, the excitation of modes is investigated. The instantaneous normal mode analysis of experimental data from two-dimensional liquid clusters gives access to the local dynamics of the liquid phase. Our investigations shed light on the role of compressional and shear modes as well as the determination of diffusion constants and melting temperatures in finite systems. Special attention is paid to hydrodynamic situations with a stationary inhomogeneous dust flow. MD simulations allow to study the collective motion in the shell of nearest neighbors, which can be linked to smooth and sudden changes of the macroscopic flow. Finally, the observed micro-motion in all situations above allows to shed light on the preference of shear-like over compressional motion in terms of a minimized potential energy and a dynamic incompressibility.

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Language(s): eng - English
 Dates: 2018-05-102018-05
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1140/epjd/e2017-80371-7
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Title: The European Physical Journal D
Source Genre: Journal
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Pages: 9 Volume / Issue: 72 (5) Sequence Number: 80 Start / End Page: - Identifier: -