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The effect of quantum oscillation in plasmas

Published online by Cambridge University Press:  08 October 2002

B. SHOKRI
Affiliation:
Physics Department and Laser Center of Shahid Beheshti University, Tehran, and Institute for Studies in Theoretical Physics and Mathematics, PO Box 19395-1795, Tehran, Iran (shokri@theory.ipm.ac.ir)

Abstract

Making use of the dielectric permitivitty of a solid state plasma obtained from linearizing a quantum hydrodynamic equation, volume and surface waves in cold semibounded plasma-like media and thin layers of solid state plasmas are investigated in the presence and absence of an external magnetic field. It is shown that quantum oscillation of free charged particles and its spatial dispersion even in cold plasmas lead to new spectra of collective oscillations. Furthermore, a new volume ion-acoustic-type wave is obtained with a quadratic dependence on the wavenumber in the long-wavelength limit. Moreover, it is shown that quantum oscillation affects the surface wave spectrum and extends it to a wider frequency region.

Type
Research Article
Copyright
2002 Cambridge University Press

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