Shielding of a moving test charge in a quantum plasma
Plasma Physics
2010-09-01 v3
Abstract
The linearized potential of a moving test charge in a one-component fully degenerate fermion plasma is studied using the Lindhard dielectric function. The motion is found to greatly enhance the Friedel oscillations behind the charge, especially for velocities larger than a half of the Fermi velocity, in which case the asymptotic behavior of their amplitude changes from 1/r^3 to 1/r^2.5. In the absence of the quantum recoil (tunneling) the potential reduces to a form similar to that in a classical Maxwellian plasma, with a difference being that the plasma oscillations behind the charge at velocities larger than the Fermi velocity are not Landau-damped.
Cite
@article{arxiv.1007.0175,
title = {Shielding of a moving test charge in a quantum plasma},
author = {D. Else and R. Kompaneets and S. V. Vladimirov},
journal= {arXiv preprint arXiv:1007.0175},
year = {2010}
}
Comments
9 pages, 11 figures. v3: Fixed typo, updated abstract