title: Polarization of wave modes in a two-dimensional hexagonal lattice using a complex (dusty) plasma.
abstract: Wave spectra corresponding to the random particle motion in a monolayer Yukawa crystal were studied for various directions of propagation. It was found that there are two wave modes with a polarization alternating between the longitudinal and transverse. In the long-wavelength regime, the modes became purely longitudinal and transverse as was known before. In the short-wavelength regime the spectra strongly depended on the wavelength and the direction of propagation. The results obtained from the experiment, theory, and simulation agreed well with each other.
authors.affiliation: CIPS, Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Zhdanov
authors.forename: S
authors.initials: S
authors.lastname: Nunomura
authors.forename: D
authors.initials: D
authors.lastname: Samsonov
authors.forename: G
authors.initials: G
authors.lastname: Morfill