Collective modes in two-dimensional one-component-plasma with logarithmic interaction

Abstract

The collective modes of a familiar two-dimensional one-component-plasma with the repulsive logarithmic interaction between the particles are analysed using the quasi-crystalline approximation (QCA) combined with the molecular dynamic simulation of the equilibrium structural properties. It is found that the dispersion curves in the strongly coupled regime are virtually independent of the coupling strength. Arguments based on the excluded volume consideration for the radial distribution function allow us to derive very simple expressions for the dispersion relations, which show excellent agreement with the exact QCA dispersion over the entire domain of wavelengths. Comparison with the results of the conventional fluid analysis is performed and the difference is explained.

References in corpus (8)

• Vortex-glass phases in type-II superconductors
• Dynamical correlations and collective excitations of Yukawa liquids
• Vortex lattce melting in 2D superconductors and Josephson arrays
• On the long-waves dispersion in Yukawa systems
• Internal energy of the classical two- and three-dimensional one-component-plasma
• Thermodynamics of Yukawa fluids near the one-component-plasma limit
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• Freezing of an unconventional two-dimensional plasma

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• Thermodynamics and dynamics of two-dimensional systems with dipole-like repulsive interactions
• High-frequency elastic moduli of two-dimensional Yukawa fluids and solids
• Practical dispersion relations for strongly coupled plasma fluids
• Simple dispersion relations for Coulomb and Yukawa fluids
• Collective modes of two-dimensional classical Coulomb fluids
• Unified description of sound velocities in strongly coupled Yukawa systems of different spatial dimensionality
• Fingerprints of different interaction mechanisms on the collective modes in complex (dusty) plasmas
• Onset of negative dispersion in one-component-plasma revisited
• Ion drift instability in a strongly coupled collisional complex plasma
• Thermal conduction in two-dimensional complex plasma layers
• Vibrational model of entropy in dense two-dimensional fluids