Wave dispersion relation of two-dimensional plasma crystals in a magnetic field.
The wave dispersion relation in a two-dimensional strongly coupled plasma crystal is studied by theoretical analysis and molecular dynamics simulation taking into account a constant magnetic field parallel to the crystal normal. The expression for the wave dispersion relation clearly shows that high-frequency and low-frequency branches exist as a result of the coupling of longitudinal and transverse modes due to the Lorenz force acting on the dust particles. The high-frequency and the low-frequency branches are found to belong to right-hand and left-hand polarized waves, respectively.
Uchida
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Centre for Interdisciplinary Plasma Science, Max-Planck-Institut für extraterrestrische Physik, D-85740 Garching, Germany. uchida@mpe.mpg.de
Konopka
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U
Morfill
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