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Abstract: A classical dusty plasma experiment was performed using two different dustgrain sizes to form a strongly coupled asymmetric bilayer two closely spacedinteracting monolayers of two species of charged dust particles. Theobservation and analysis of the thermally excited particle oscillationsrevealed the collective mode structure and wave dispersion in this system; inparticular the existence of the theoretically predicted $k=0$ energyfrequency gap was verified. Equilibrium molecular dynamics simulations wereperformed to emulate the experiment, assuming Yukawa type inter-particleinteraction. The simulations and analytic calculations based both on latticesummation and on the QLCA approach are in good agreement with the experimentalfindings and help identifying and characterizing the observed phenomena.



Autor: P. Hartmann, Z. Donko, G. J. Kalman, S. Kyrkos, K. I. Golden, M. Rosenberg

Fuente: https://arxiv.org/







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