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Multipair Excitations and Dynamic Response of the Metallic Electron Gas in Two and Three Dimensions

  • D. Neilson
  • F. Green
  • D. Pines
  • J. Szymański

Abstract

We demonstrate, using a quantitative microscopic formalism, that multipair excitations significantly affect the dynamic response of the electron gas even for densities as high as rs = 2 in the bulk. For the two-dimensional electron gas in GaAs/GaAlAs heterostructures we find that the effects of multipair excitations are even more pronounced, indicating that the standard single particle description of 2D electron systems should be used with caution. We discuss the essential role that multipair contributions at high frequency play in maintaining the frequency moment sum rules for the dynamic response of the electron gas.

Keywords

Single Pair Random Phase Approximation Pair Excitation Metallic Density Aluminium Arsenide 
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References

  1. 1.
    F. Green, D. Neilson, and J. Szymański, Phys. Rev. B31, 2779 (1985);Google Scholar
  2. 1.
    F. Green, D. Neilson, and J. Szymański, Phys. Rev. B31, 5837 (1985).Google Scholar
  3. 2.
    F. Green, D. Neilson, and J. Szymański, Phys. Rev. B31, 2796 (1985).Google Scholar
  4. 3.
    G. Baym and L. P. Kadanoff, Phys. Rev. 124, 287 (1961).CrossRefGoogle Scholar
  5. 4.
    F. Green, D. Neilson, D. Pines, and J. Szymański, in Recent Progress in Many Body Theories, R. A. Smith and F. J. Siemens editors, Springer, Berlin (1986), and to be published.Google Scholar
  6. 5.
    M. W. C. Dharma-Wardana and R. Taylor, J. Phys. F10, 2217 (1980).CrossRefGoogle Scholar
  7. 6.
    F. Stem and S. Das Sarma, Phys. Rev. B30, 840 (1984).Google Scholar
  8. 7.
    F. Stern and W. E. Howard, Phys. Rev. 163, 816 (1967).CrossRefGoogle Scholar
  9. 8.
    F. Green, D. Neilson, J. Szymański, and R. Taylor, unpublished.Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • D. Neilson
    • 1
  • F. Green
    • 1
  • D. Pines
    • 2
  • J. Szymański
    • 3
  1. 1.School of PhysicsUniversity of New South WalesSydneyAustralia
  2. 2.Department of PhysicsUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  3. 3.Telecom Australia Research LaboratoriesClaytonAustralia

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