The effect of quantum oscillation in plasmas

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.

Modulational interactions in quantum plasmas

“…It is well known that a plasma is a many-particle system and for its description it is thus natural to use methods of statistical physics [35][36][37]. Most often the plasma is in partial thermodynamic equilibrium, and its components have different temperatures with different equilibrium functions [38,39]. The Maxwellian distribution of particles is possible only for sufficiently high temperatures, when the Fermi degeneracy following from the Pauli exclusion principle is negligible.…”

The effects of thermal velocities on frequency spectra of an unbounded collisionless degenerate plasma with two different types of equilibrium distribution functions

“…It is well known that a plasma is a many-particle system and for its description it is thus natural to use methods of statistical physics [1][2][3]. Most often the plasma is in partial thermodynamic equilibrium, and its components have different temperature with different equilibrium distribution functions [4,5]. The Maxwellian distribution of particles is possible only for sufficiently high temperatures, when the Fermi degeneracy following from the Pauli exclusion principle is absent.…”

Quantum effects on propagation of surface Langmuir oscillations in semi-bounded quantum plasmas

“…Recently, there has been a great interest in investigating physical properties of quantum plasmas [1][2][3][4] since the quantum plasmas can be found in various nano-scale objects such as nano-wires, quantum dot, and semiconductor devices as well as in dense laser produced plasmas. It is well known that the Langmuir wave in bulk cold classical plasmas cannot be propagated and shows the electrostatic oscillations.…”