### Abstract

The structure of spherical clusters composed of Yukawa particles is analyzed by molecular dynamics simulations and theoretical approaches as a model for dust particles in dusty plasmas in the isotropic environment. The latter condition is expected to be realized under microgravity or by active cancellation of the effect of gravity on the ground. It is found that, at low temperatures, Yukawa particles form spherical shells and, when scaled by the mean distance, the structure is almost independent of the strength of screening including the case of the Coulomb interaction. The positions and populations of shells and the conditions for the change of the number of shells are expressed by simple interpolation formulas. Shells have an approximately equal spacing close to that of triangular lattice planes in the bulk close-packed structures. It is shown that, when the cohesive energy in each shell is properly taken into account, the shell model reproduces the structure of spherical Yukawa clusters to a good accuracy.

Original language | English |
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Article number | 036406 |

Journal | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |

Volume | 72 |

Issue number | 3 |

DOIs | |

Publication status | Published - Sep 2005 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Condensed Matter Physics
- Statistical and Nonlinear Physics
- Mathematical Physics

### Cite this

*Physical Review E - Statistical, Nonlinear, and Soft Matter Physics*,

*72*(3), [036406]. https://doi.org/10.1103/PhysRevE.72.036406

**Structure of spherical Yukawa clusters : A model for dust particles in dusty plasmas in an isotropic environment.** / Totsuji, Hiroo; Ogawa, Takafumi; Totsuji, Chieko; Tsuruta, Kenji.

Research output: Contribution to journal › Article

*Physical Review E - Statistical, Nonlinear, and Soft Matter Physics*, vol. 72, no. 3, 036406. https://doi.org/10.1103/PhysRevE.72.036406

}

TY - JOUR

T1 - Structure of spherical Yukawa clusters

T2 - A model for dust particles in dusty plasmas in an isotropic environment

AU - Totsuji, Hiroo

AU - Ogawa, Takafumi

AU - Totsuji, Chieko

AU - Tsuruta, Kenji

PY - 2005/9

Y1 - 2005/9

N2 - The structure of spherical clusters composed of Yukawa particles is analyzed by molecular dynamics simulations and theoretical approaches as a model for dust particles in dusty plasmas in the isotropic environment. The latter condition is expected to be realized under microgravity or by active cancellation of the effect of gravity on the ground. It is found that, at low temperatures, Yukawa particles form spherical shells and, when scaled by the mean distance, the structure is almost independent of the strength of screening including the case of the Coulomb interaction. The positions and populations of shells and the conditions for the change of the number of shells are expressed by simple interpolation formulas. Shells have an approximately equal spacing close to that of triangular lattice planes in the bulk close-packed structures. It is shown that, when the cohesive energy in each shell is properly taken into account, the shell model reproduces the structure of spherical Yukawa clusters to a good accuracy.

AB - The structure of spherical clusters composed of Yukawa particles is analyzed by molecular dynamics simulations and theoretical approaches as a model for dust particles in dusty plasmas in the isotropic environment. The latter condition is expected to be realized under microgravity or by active cancellation of the effect of gravity on the ground. It is found that, at low temperatures, Yukawa particles form spherical shells and, when scaled by the mean distance, the structure is almost independent of the strength of screening including the case of the Coulomb interaction. The positions and populations of shells and the conditions for the change of the number of shells are expressed by simple interpolation formulas. Shells have an approximately equal spacing close to that of triangular lattice planes in the bulk close-packed structures. It is shown that, when the cohesive energy in each shell is properly taken into account, the shell model reproduces the structure of spherical Yukawa clusters to a good accuracy.

UR - http://www.scopus.com/inward/record.url?scp=28844437443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28844437443&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.72.036406

DO - 10.1103/PhysRevE.72.036406

M3 - Article

AN - SCOPUS:28844437443

VL - 72

JO - Physical Review E

JF - Physical Review E

SN - 2470-0045

IS - 3

M1 - 036406

ER -