Bond Orientational Order Parameters in the Crystalline Phases of the Classical Yukawa-Wigner Bilayers

Abstract

We present a study of the structural properties of the crystalline phases for a planar bilayer of particles interacting via repulsive Yukawa potentials in the weak screening region. The study is done with Monte Carlo computations and the long ranged contributions to energy are taken into account with the Ewald method for quasi-two dimensional systems. Two first order phase transitions (fluid-solid and solid-solid) and one second order transition (solid-solid) are found when the surface density is varied at constant temperature. A particular attention is pay to the characteristics of the crystalline phases by the analysis of bond orientational order parameters and center-to-center correlations functions.

6 pages, 6 figures, 2 tables

References in corpus (4)

• Solid superheating observed in two-dimensional strongly-coupled dusty plasma
• Reentrant transitions in colloidal or dusty plasma bilayers
• Yukawa potentials in systems with partial periodic boundary conditions I : Ewald sums for quasi-two dimensional systems
• Ewald sums for Yukawa potentials in quasi-two-dimensional systems

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• The rich polymorphic behavior of Wigner bilayers
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• Surface-charge-induced freezing of colloidal suspensions
• Ewald methods for inverse power-law interactions in tridimensional and quasi-two dimensional systems
• Taking one charge off a two-dimensional Wigner crystal
• Reliable computational prediction of supramolecular ordering of complex molecules under electrochemical conditions
• Phase diagram and critical properties of Yukawa bilayers
• Strongly coupled Yukawa trilayer liquid: Structure and dynamics
• The asymmetric Wigner bilayer
• Network efficiency of spatial systems with fractal morphology: a geometric graphs approach