Orientational order and topological defects in two-dimensional Yukawa systems

New numerical results concerned with formation of orientational order and topological defects in non-ideal systems of particles, interacted via screened Coulomb potential, are presented. Calculations have been performed in a wide range of parameters, corresponding to the experimental conditions in t...

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Bibliographic Details
Published in:Physics letters. A 2014-02, Vol.378 (9), p.719-722
Main Authors: Vaulina, O.S., Vasilieva, E.V.
Format: Article
Language:English
Subjects:
Bonding
Correlation
Defects
Dusty plasmas
Mathematical analysis
Mathematical models
Solid state physics
Topology
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Summary:New numerical results concerned with formation of orientational order and topological defects in non-ideal systems of particles, interacted via screened Coulomb potential, are presented. Calculations have been performed in a wide range of parameters, corresponding to the experimental conditions in the laboratory dusty plasmas. Relations between a number of topological defects and shape of a bond-angular correlation function are obtained for the first time. •We model a formation of topological defects and g6(r) in non-ideal Yukawa systems.•A shape of g6(r)-function is completely determined by the value of occurring defects.•Normalized g6⁎(r)-curves are almost the same within various phases of 2D-systems.•We propose new approximations of g6(r) for systems with limited number of particles.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2014.01.010