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Possible negative collisional damping and instability of a drifting two-dimensional quantum plasma

Journal Article


Abstract


  • The high-frequency conductivity/resistivity of a two-dimensional quantum plasma embedded in a random distribution of impurities is calculated with the use of a semiclassical kinetic description. The plasma is drifting at speed vD relative to the impurities and the system is under the influence of an electromagnetic radiation of wave number q and frequency w. It is shown that the collisional damping rate exhibits some anomalous oscillatory behavior due to the electron fluctuations which disturb the system from thermodynamic equilibrium when vD - Fermi velocity VF. As a consequence, there exists a frequency-dependent critical velocity vc(��), above which the system behaves like a negative resistive medium. �� 1993 IOP Publishing Ltd.

Publication Date


  • 1993

Published In


  • EPL  Journal

Citation


  • Zhang, C., & Gumbs, G. (1993). Possible negative collisional damping and instability of a drifting two-dimensional quantum plasma. EPL, 21(3), 351-356. doi:10.1209/0295-5075/21/3/016

Scopus Eid


  • 2-s2.0-84956125797

Start Page


  • 351

End Page


  • 356

Volume


  • 21

Issue


  • 3

Place Of Publication


Abstract


  • The high-frequency conductivity/resistivity of a two-dimensional quantum plasma embedded in a random distribution of impurities is calculated with the use of a semiclassical kinetic description. The plasma is drifting at speed vD relative to the impurities and the system is under the influence of an electromagnetic radiation of wave number q and frequency w. It is shown that the collisional damping rate exhibits some anomalous oscillatory behavior due to the electron fluctuations which disturb the system from thermodynamic equilibrium when vD - Fermi velocity VF. As a consequence, there exists a frequency-dependent critical velocity vc(��), above which the system behaves like a negative resistive medium. �� 1993 IOP Publishing Ltd.

Publication Date


  • 1993

Published In


  • EPL  Journal

Citation


  • Zhang, C., & Gumbs, G. (1993). Possible negative collisional damping and instability of a drifting two-dimensional quantum plasma. EPL, 21(3), 351-356. doi:10.1209/0295-5075/21/3/016

Scopus Eid


  • 2-s2.0-84956125797

Start Page


  • 351

End Page


  • 356

Volume


  • 21

Issue


  • 3

Place Of Publication