Structure of Strongly Coupled Plasmas in Quasi-two-dimensional Confinement. A Monte Carlo Study

O. Bystrenko
Bogolyubov Institute for Theoretical Physics, 14b Metrolohichna st., 03143 Kiev, Ukraine
Abstract. Structure of liquid and crystal state in strongly coupled plasmas confined in quasi-two-dimensional geometry
are studied by means of Monte Carlo computer simulations. There are monitored energy, specific heat, transverse density
distributions, intra- and interlayer radial 2D-correlations and the bond-orientational correlation functions. The results of
simulations are found to be in very good agreement with the experiments with the relevant physical systems, such as 2D
Wigner lattice formed by electrons on the surface of liquid Helium, and the planar ion structures in Penning traps.
Keywords: strongly coupled plasmas, Monte Carlo simulations
PACS: 52.27.Gr, 52.27.Lw, 52.65.Pp
INTRODUCTION
Quasi-two-dimensional (quasi-2D) strongly coupled Coulomb systems attracted considerable attention of researchers
during decades. The well known examples are charged colloids confined between two plates, dusty plasmas trapped in
one-dimensional potential profiles, electron plasmas in the inversion layers and quantum wells in semiconductors, etc..
Most interesting feature of these systems is their capability to form strongly correlated condensed state at sufficiently
strong coupling (i.e., at low temperatures and high densities).
The simplest theoretical model for strongly coupled Coulomb systems is the model of one-component plasmas
(OCP). The latter is appropriate in the case that the properties of a system are determined predominantly by the
subsystem of charges of one kind, and the effects produced by the other components (e.g., screening) are negligible.
The properties of infinite three-dimensional (3D) OCP are known rather well due to extensive computer simulations.
It has been established that for strong coupling, i.e., as the coupling constant exceeds the melting point Gm

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