TITLE

Quantum electron-acoustic double layers in two electron species quantum plasma

AUTHOR(S)
Sah, Om Prakash
PUB. DATE
January 2009
SOURCE
Physics of Plasmas;Jan2009, Vol. 16 Issue 1, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The existence and the characteristic properties of electron-acoustic double layers are investigated in three component unmagnetized dense quantum plasmas consisting of stationary background ions and two electron populations: one “cold” and the other “hot.” Using the one-dimensional quantum hydrodynamic model and the reductive perturbation technique, a generalized form of nonlinear quantum Korteweg–de Vries equation governing the dynamics of weak electron acoustic double layers is derived. A stationary solution of this equation is obtained to discuss the existence criteria of different types of double layers and their characteristic properties. It is shown that two types of compressive double layers: one in the lower δ-parameter region and the other at the higher δ-parameter region, along with rarefactive double layers in the intermediate region, may exist, where δ=nec0/neh0 is the ratio of unperturbed cold to hot electron densities. The width, the amplitude, and the velocity of these double layers are significantly affected by the δ-parameter. The relevance of the present investigation is also discussed.
ACCESSION #
36377639

 

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