Structure and phase diagram of strongly-coupled bipolar charged-particle bilayersP. Hartmann1, Z. Donkó1 and G. J. Kalman2
1 Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences - P.O. Box 49, H-1525 Budapest, Hungary
2 Department of Physics, Boston College - Chestnut Hill, MA 02467, USA
received 5 October 2004; accepted in final form 8 September 2005
published online 30 September 2005
We report Monte Carlo simulations of a classical, strongly-coupled charged-particle bilayer with opposite charges in the two layers. At layer separations comparable to the Wigner-Seitz radius the two layers support each other to establish a quasi-long-range order; at low layer separations stable dipoles (classical equivalents of bound excitons) are formed and the long-range order is extinguished as the Coulomb interaction changes to a dipole-dipole interaction. We identify dipole-liquid, dipole-solid, Coulomb-liquid and Coulomb-solid phases, which are exhibited in an intuitive phase diagram of the system in the (coupling)-d (layer separation) plane.
52.27.Gr - Strongly-coupled plasmas.
68.65.Ac - Multilayers.
05.20.-y - Classical statistical mechanics.
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