Direct observation of Coulomb crystals and liquids in strongly coupled rf dusty plasmas

Chu, Junhao; Lin, I‐Nan

doi:10.1103/physrevlett.72.4009

Cited by 1,298 publications

(649 citation statements)

References 19 publications

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“…This prediction was soon verified in plasma discharges [6][7][8], and strongly coupled plasmas have since become a popular research area among plasma physicists. The large masses of the dust particles can cause complications when studying strongly coupled dusty plasmas on earth-based experiments.…”

Section: Introductionmentioning

confidence: 96%

Nonlinear dust-acoustic solitary waves in strongly coupled dusty plasmas

et al. 2012

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Dust-acoustic waves are investigated in a three-component plasma consisting of strongly coupled dust particles and Maxwellian electrons and ions. A fluid model approach is used, with the effects of strong coupling being accounted for by an effective electrostatic "pressure" which is a function of the dust number density and the electrostatic potential. Both linear and weakly nonlinear cases are considered by derivation and analysis of the linear dispersion relation and the Korteweg-de Vries equation, respectively. In contrast to previous studies using this model, this paper presents the results arising from an expansion of the dynamical form of the electrostatic pressure, accounting for the variations in its value in the vicinity of the wave.

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Section: Introductionmentioning

confidence: 96%

Nonlinear dust-acoustic solitary waves in strongly coupled dusty plasmas

et al. 2012

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“…Another class of confined quasi-one-dimensional ͑Q1D͒ geometries appears in many diverse fields of research and some typical and important examples from the experimental point of view are: electrons on liquid Helium, 3,4 microfluidic devices, 5 colloidal suspensions, 6 and confined dusty plasma. 7 A major phenomenon which is expected to occur in charged particles interacting via a Coulomb or screened Coulomb potential is Wigner crystallization ͑WC͒ ͑Ref. 8͒ at low enough temperatures and densities when the potential energy overwhelms the kinetic energy.…”

Section: Introductionmentioning

confidence: 99%

Generic properties of a quasi-one-dimensional classical Wigner crystal

et al. 2004

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We studied the structural, dynamical properties and melting of a quasi-one-dimensional system of charged particles, interacting through a screened Coulomb potential. The ground state energy was calculated and, depending on the density and the screening length, the system crystallizes in a number of chains. As a function of the density (or the confining potential), the ground state configurations and the structural transitions between them were analyzed both by analytical and Monte Carlo calculations. The system exhibits a rich phase diagram at zero temperature with continuous and discontinuous structural transitions. We calculated the normal modes of the Wigner crystal and the magneto-phonons when an external constant magnetic field B is applied. At finite temperature the melting of the system was studied via Monte Carlo simulations using the modif ied Lindemann criterion (MLC). The melting temperature as a function of the density was obtained for different screening parameters. Reentrant melting as a function of the density was found as well as evidence of directional dependent melting. The single chain regime exhibits anomalous melting temperatures according to the MLC and as a check we study the pair correlation function at different densities and different temperatures, which allowed us to formulate a different criterion. Possible connection with recent theoretical and experimental results are discussed and experiments are proposed.

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“…A longlived controversy was ignited by the suggestion [5] that like-charged macroparticles need not repel each other as predicted by PoissonBoltzmann (PB) mean field theory [6][7][8][9][10][11][12][13]. In the area of dust plasmas, one can observe transitions from a disordered gaseous-like phase to a liquid-like phase and the formation of ordered structures of particles-plasma crystals [14][15][16][17]. The wake effect has been proposed as the most promising candidate for the formation of the dust-plasma crystals [18,19], and it was experimentally confirmed to be responsible for the attraction of two macroparticles by optical manipulations using radiation pressure from laser light [20,21].…”

Section: Introductionmentioning

confidence: 99%

The Anisotropic Cell Model in the Colloidal Plasmas

Ye¹,

Lu²

2010

PIER

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Abstract-The anisotropic spherical Wigner-Seitz (WS) cell model -introduced to describe colloidal plasmas -is investigated using the linearized Poisson-Boltzmann (PB) equation. As an approximation, the surface potential of the spherical macroparicle expanded in terms of the monopole (q) and the dipole (p) is considered as an anisotropic boundary condition of the linear PB equation. Here, the "apparent" moments q and p are the moments 'seen' in the microion cloud, respectively. Based on a new physical concept, the momentneutrality, the potential around the macroparticle can be solvable analytically if the relationship between the actual moment and the "apparent" moment can be obtained according to the momentneutrality condition in addition to the usual electroneutrality. The calculated results of the potential show that there is an attractive region in the vicinity of macroparticle when the corresponding dipole part of the potential dominates over the monopole part, and there is an attractive region and a repulsive region at the same time, i.e., a potential well, when the corresponding dipole part of the potential just comes into play. It provides the possibility and the conditions of the appearance of periodic structure of the colloidal plasmas, although it is a result of a simple theoretical model.

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Direct observation of Coulomb crystals and liquids in strongly coupled rf dusty plasmas

Cited by 1,298 publications

References 19 publications

Nonlinear dust-acoustic solitary waves in strongly coupled dusty plasmas

Nonlinear dust-acoustic solitary waves in strongly coupled dusty plasmas

Generic properties of a quasi-one-dimensional classical Wigner crystal

The Anisotropic Cell Model in the Colloidal Plasmas

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