Coexistence of hexatic and isotropic phases in two-dimensional Yukawa systems

Abstract

We have performed Brownian dynamics simulations on melting of two-dimensional colloidal crystal in which particles interact with Yukawa potential. The pair correlation function and bond-orientational correlation function was calculated in the Yukawa system. An algebraic decay of the bond orientational correlation function was observed. By ruling out the coexistence region, only a unstable hexatic phase was found in the Yukawa systems. But our work shows that the melting of the Yukawa systems is a two-stage melting not consist with the KTHNY theory and the isotropic liquid and the hexatic phase coexistence region was found. Also we have studied point defects in two-dimensional Yukawa systems.

arXiv comment9 pages, 8 figures. any comments are welcome

References in corpus (5)

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Cited by in corpus (7)

• 2D Melting: From Liquid-Hexatic Coexistence to Continuous Transitions
• Can random pinning change the melting scenario of two-dimensional core-softened potential system?
• Phase diagram and melting scenarios of two-dimensional Hertzian spheres
• Random pinning elucidates the nature of melting transition in two-dimensional core-softened potential system
• Self-organisation of semi-flexible rod-like particles
• Geometrical defects in two-dimensional melting of many-particle Yukawa systems
• Topological Phase Transition in a Quasi Two Dimensional Coulomb Gas