Defects and particle motions in the nonuniform melting of a two-dimensional Coulomb cluster

Ying Ju Lai, I. Lin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The defect excitation and nonuniform melting of a two-dimensional Coulomb cluster with 300 charged particles (interacting with (Formula presented) type force) in a uniform neutralizing background are studied numerically. Intrinsic defects exist around the outer circular shells surrounding the inner triangular lattice. They are the source regions for anisotropic particle thermal vibrations and then cyclic hoppings with the increasing temperature. It leads to the nonuniform melting associated with the thermal motion of intrinsic defects, and then the thermal excitation of dislocation pairs and disclinations. The intrinsic defect free center core has the highest melting temperature. It shows the sequential losses of translational and then orientational orders.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume64
Issue number1
DOIs
StatePublished - 2001

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