Collective dynamics of complex plasma bilayers

Abstract

A classical dusty plasma experiment was performed using two different dust grain sizes to form a strongly coupled asymmetric bilayer (two closely spaced interacting monolayers) of two species of charged dust particles. The observation and analysis of the thermally excited particle oscillations revealed the collective mode structure and wave dispersion in this system; in particular the existence of the theoretically predicted $k=0$ energy (frequency) gap was verified. Equilibrium molecular dynamics simulations were performed to emulate the experiment, assuming Yukawa type inter-particle interaction. The simulations and analytic calculations based both on lattice summation and on the QLCA approach are in good agreement with the experimental findings and help identifying and characterizing the observed phenomena.

Submitted to PRL

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• Dynamics of two-dimensional complex plasmas in a magnetic field
• Structure and dynamics of a glass-forming binary complex plasma with non-reciprocal interaction
• DPEx-II: A New Dusty Plasma Device Capable of Producing Large Sized DC Coulomb Crystals
• Buckling of 2D Plasma Crystals with Non-reciprocal Interactions
• Plasma-grains interaction mediated by streaming non-Maxwellian ions
• Collision induced amplification of wakes in streaming plasmas
• Strong Coupling Effects in Binary Yukawa Systems
• Phonon spectra of a two-dimensional solid dusty plasma modified by two-dimensional periodic substrates
• Dispersion relation of square lattice waves in a two-dimensional binary complex plasma
• Second Plasmon and Collective Modes in Binary Coulomb Systems
• Strongly coupled Yukawa trilayer liquid: Structure and dynamics
• The Effect of Pinning on Drag in Coupled One-Dimensional Channels of Particles