3D Coulomb balls: experiment and simulation

Arp, O.; Block, Dietmar; Bönitz, M.; Fehske, Holger; Golubnychiy, V.; Kosse, S.; Ludwig, P.; Melzer, A.; Piel, A.

doi:10.1088/1742-6596/11/1/023

Cited by 37 publications

(31 citation statements)

References 17 publications

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“…Extensive tables for N ≤ 160 and some larger clusters were presented in Ref. [96] and the results were later confirmed by other groups, e.g. [97,98].…”

Section: Ground and Metastable Statessupporting

confidence: 59%

Structure and Phase Transitions of Yukawa Balls

Baumgartner

Block

Bönitz

2009

Contrib. Plasma Phys.

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In this review, an overview of structural properties and phase transitions in finite spherical dusty (complex) plasma crystals -so-called Yukawa balls -is given. These novel kinds of Wigner crystals can be directly analyzed experimentally with video cameras. The experiments clearly reveal a shell structure and allow to determine the shell populations, to observe metastable states and transitions between configurations as well as phase transitions. The experimental observations of the static properties are well explained by a rather simple theoretical model which treats the dust particles as being confined by a parabolic potential and interacting via an isotropic Yukawa pair potential. The excitation properties of the Yukawa balls such as normal modes and the dynamic behavior, including the time-dependent formation of the crystal requires, in addition, to include the effect of friction between the dust particles and the neutral gas. Aside from first-principle molecular dynamics and Monte Carlo simulations several analytical approaches are reviewed which include shell models and a continuum theory. A summary of recent results and theory-experiment comparisons is given and questions for future research activities are outlined.

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“…Extensive tables for N ≤ 160 and some larger clusters were presented in Ref. [96] and the results were later confirmed by other groups, e.g. [97,98].…”

Section: Ground and Metastable Statessupporting

confidence: 59%

Structure and Phase Transitions of Yukawa Balls

Baumgartner

Block

Bönitz

2009

Contrib. Plasma Phys.

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“…In a similar way, the ground state and effective coupling parameter can be defined for any particle number, but this has to be done numerically. 23,42 The results are strongly N-dependent due to the importance of shell filling and finite size effects. This leads to strong variations of the crystal stability with N as can be seen in the melting temperatures, left part of Fig.…”

Section: ͑3͒mentioning

confidence: 99%

Classical and quantum Coulomb crystals

et al. 2008

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Strong correlation effects in classical and quantum plasmas are discussed. In particular, Coulomb ͑Wigner͒ crystallization phenomena are reviewed focusing on one-component non-neutral plasmas in traps and on macroscopic two-component neutral plasmas. The conditions for crystal formation in terms of critical values of the coupling parameters and the distance fluctuations and the phase diagram of Coulomb crystals are discussed.

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“…This model was already used to find the ground state configurations and their energies for Coulomb interaction in [19,20]. Here, we extended the investigation to the ground states of finite Yukawa systems.…”

Section: Model and Simulation Techniquementioning

confidence: 99%

Ground states of finite spherical Yukawa crystals

et al. 2008

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On the Coulomb-dipole transition in mesoscopic classical and quantum electron-hole bilayers P Ludwig, K Balzer, A Filinov et al. Abstract. Small three-dimensional strongly coupled clusters of charged particles in a spherical confinement potential arrange themselves in nested concentric shells. If the particles are immersed into a background plasma the interaction is screened. The cluster shell configuration is known to be sensitive to the screening strength. With increased screening, an increased population of the inner shell(s) is observed. Here, we present a detailed analysis of the ground state shell configurations and configuration changes in a wide range of screening parameters for clusters with particle numbers N in the range of 11 to 60. We report three types of anomalous behaviors which are observed upon increase of screening, at fixed N or for an increase of N at fixed screening. The results are obtained by means of extensive first principle molecular dynamics simulations.

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3D Coulomb balls: experiment and simulation

Cited by 37 publications

References 17 publications

Structure and Phase Transitions of Yukawa Balls

Structure and Phase Transitions of Yukawa Balls

Classical and quantum Coulomb crystals

Ground states of finite spherical Yukawa crystals

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