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Zero Sound

  • Wilhelm Brenig

Abstract

In the previous chapter we saw that in the long-wavelength limit kℓ ≪ 1 ( = υ f τ) one has to distinguish the low-frequency (ωτ ≪ 1) and high-frequency (ωτ ≫1) limits. In the first case one has local equilibrium with a hydrodynamic behaviour (diffusion in the case of electrons). In the second case one can neglect collisions. Nevertheless one has collective excitations, the so-called plasma vibrations. They occur as a consequence of the self-consistent Hartree field.

Keywords

Sound Velocity Collective Excitation Previous Chapter Hydrodynamic Behaviour Sound Attenuation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 35.1
    Landau, LX,.: Sov. Phys. - JETP 32, 59 (1957)Google Scholar
  2. 35.2
    Abel, W.R., Anderson, A.C., Wheatly, J.C.: Phys. Rev. Lett. 17, 74 (1966)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • Wilhelm Brenig
    • 1
  1. 1.Physik-DepartmentTechnische Universität MünchenGarchingFed. Rep. of Germany

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