Abstract
The problem of plasma waves in a thick wire in the presence of a magnetic field perpendicular to the wire is considered in the random phase approximation. The standard model of a wire, with a parabolic confinement potential, is used. The polarization operator of a degenerate and a nondegenerate electron gas in the wire is calculated for an arbitrary width of that potential. Formulas are obtained for the spectrum and damping of intrasubband and intersubband magnetoplasmons in wires with a degenerate and nondegenerate electron gas for an arbitrary number of filled confinement subbands. The anisotropy of the magnetoplasmon spectrum in a thick wire and the screening of the Coulomb field of an electric charge in the wire are considered.
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