title: Cutoff wave number for shear waves in a two-dimensional Yukawa system (dusty plasma).
abstract: The cutoff wave number for shear waves in a liquid-state strongly coupled plasma was measured experimentally. The phonon spectra of random particle motion were measured at various temperatures in a monolayer dusty plasma, where microspheres interact with a Yukawa potential. In the liquid state of this particle suspension, shear waves were detected only for wavelengths smaller than 20 to 40 Wigner-Seitz radii, depending on the Coulomb coupling parameter. The temperature of the suspension was controlled using a laser-heating method.
authors.affiliation: Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA.
authors.forename: V
authors.initials: V
authors.lastname: Nosenko
authors.forename: J
authors.initials: J
authors.lastname: Goree
authors.forename: A
authors.initials: A
authors.lastname: Piel