Two-dimensional binary clusters in a hard-wall trap: structural and spectral properties

Wen Yang, Minghui Kong, M. V. Milosevic, Zhi Zeng, F. M. Peeters

Research output: Contribution to journalArticle

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Abstract

Within the Monte Carlo formalism supplemented by the modified Newton-Raphson optimization technique, we investigated structural and dynamical properties of two-dimensional binary clusters confined in an external hard-wall potential. Two species of differently charged classical particles, interacting through the repulsive Coulomb force are confined in the cluster. Subtle changes in the energy landscape and the stable cluster configurations are investigated as a function of the total number of particles and the relative number of each of the two particle species. The excitation spectrum and the normal modes corresponding to the ground-state configuration of the system are discussed, and the lowest nonzero eigenfrequency as a measure of the stability of the cluster is analyzed. The influence of the particle mass on the eigenfrequencies and eigenmodes are studied, i.e., we study a binary system of particles with different charge and different mass. Several unique features distinct from a monodisperse system are obtained.
Original languageEnglish
Article number041404
JournalPhysical Review E
Volume76
Issue number4
DOIs
Publication statusPublished - 2007

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Spectral Properties
Trap
Structural Properties
traps
Binary
Eigenfrequency
particle mass
configurations
Configuration
Energy Landscape
Binary System
Newton-Raphson
newton
Normal Modes
Optimization Techniques
Ground State
formalism
Lowest
Excitation
optimization

Cite this

Two-dimensional binary clusters in a hard-wall trap : structural and spectral properties. / Yang, Wen; Kong, Minghui; Milosevic, M. V.; Zeng, Zhi; Peeters, F. M.

In: Physical Review E, Vol. 76, No. 4, 041404, 2007.

Research output: Contribution to journalArticle

Yang, Wen ; Kong, Minghui ; Milosevic, M. V. ; Zeng, Zhi ; Peeters, F. M. / Two-dimensional binary clusters in a hard-wall trap : structural and spectral properties. In: Physical Review E. 2007 ; Vol. 76, No. 4.
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