Intergrain Coupling in Dusty-Plasma Coulomb Crystals

Mohideen, U.; Rahman, H. U.; Smith, Mark A.; Rosenberg, M.; Mendis, D. A.

doi:10.1103/physrevlett.81.349

Cited by 140 publications

(53 citation statements)

References 22 publications

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“…Use of a dipole to describe the top layer only, leads to an asymmetric force between the two layers and interesting stability properties of this system. More generally, the dipole model can also take into account the intrinsic polarization of the grains interacting with the sheath electric field (16). Recently, Lee et al (17) have included a dipole moment to calculate the energy of a dusty plasma crystal and obtain a phase diagram as a h c t i o n of lattice spacing and the magnitude of the dipole contribution relative to the monopole force.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulations of dipolar dusty plasmas

Hammerberg¹,

Holian²,

Murillo³

et al. 1998

AIP Conference Proceedings

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Abstract. We use moIecular dynamics (MD) simulation methods to investigate dusty plasma crystal structure in an external potential, with the grains subject to both a spherically symmetric Debye-Htickel potential and a cylindrically symmetric dipole interaction. The dipole contribution models the experimentally important effects of ion ffow or intrinsic grain polarization. We find that the addition of a small dipole term changes the crystal structure from bct to one in which the grains are aligned vertically, consistent with experiments as well as recent theoretical calculations.

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Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulations of dipolar dusty plasmas

Hammerberg¹,

Holian²,

Murillo³

et al. 1998

AIP Conference Proceedings

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“…Thus it is noted that the coupling parameter in the form of equation (2) provides a better description of a phase transition. The results of experimental research regarding the formation of plasma crystals [13] showed the necessity of modernizing the coupling parameter equation (2) to the following form…”

Section: The State Of the Problemmentioning

confidence: 99%

Coupling parameter for low-temperature plasma with condensed phase

Vishnyakov¹,

Dragan²

2007

Condens. Matter Phys.

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“…To our knowledge, there are three kinds of physical mechanisms proposed to explain the formation of a dipole: (a) Field-induced dipole which is derived from dielectric polarization produced by the nearby charged object and the external field [28][29][30][31][32][33][34][35][36][37]; (b) compound-dipole which is caused by displacement of the centers of macroparticle charge and microion clouds (deformed sheath or double layer), it means that the macroparticle charge and the microion cloud charge form two poles of dipole [38][39][40][41][42][43]; (c) charging-resulted dipole which is caused by the nonuniform distribution of surface charge of macroparticles [44][45][46][47][48]. Whatever the reason for the formation of the dipole, the dipole or the macroparticle is in anisotropic microion cloud.…”

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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Intergrain Coupling in Dusty-Plasma Coulomb Crystals

Cited by 140 publications

References 22 publications

Molecular dynamics simulations of dipolar dusty plasmas

Molecular dynamics simulations of dipolar dusty plasmas

Coupling parameter for low-temperature plasma with condensed phase

The Anisotropic Cell Model in the Colloidal Plasmas

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