Interaction of Phonons with the 2-DEG in a MODFET

  • J. K. Wigmore
  • M. Erol
  • M. Sahraoui-Tahar
  • M. Ari
  • J. H. Davies
  • M. Holland
  • C. Stanley
  • C. D. W. Wilkinson
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 112)

Abstract

Using nanosecond pulse techniques, we have studied the direct emission and absorption of phonons by the same two-dimensional electron gas (2DEG) in a GaAs/AlGaAs modulation-doped field effect transistor structure (MODFET) [1]. Pulsed emission of phonons from a heterojunction has been observed by Chin et al [2], and by Hawker et al [3], and absorption by Eisenstein et al [4]. In a MODFET, the additional feature of a Schottky gate allows the carrier concentration and hence the Fermi energy to be varied. It also enables the 2DEG contact resistance to be determined independently during a run at helium temperatures, essential for quantitative analysis.

Keywords

Helium GaAs Clarification 

References

  1. [1]
    J. K. Wigmore, M. Erol, M. Sahraoui-Tahar and C. D. W. Wilkinson, J. H. Davies and C. Stanley, Semicond. Sci. Technol. 6 1 (1991).Google Scholar
  2. [2]
    M. A. Chin, V. Narayanamurti, H. L. Stormer and J. C. M. Hwang, Phonon Scattering in Condensed Matter IV (Springer, Berlin) 328 (1985).Google Scholar
  3. [3]
    P. Hawker, A. J. Kent, O. M. Hughes and L. J. Challis, Semiconduct. Sci. Technol. 7 B29 (1992).Google Scholar
  4. [4]
    J. P. Eisenstein, V. Narayanmurti, H. L. Stormer, A. Y. Cho and J.C.M. Hwang, Phonon Scattering in Condensed Matter V (Springer, Berlin) 401 (1986).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • J. K. Wigmore
    • 1
  • M. Erol
    • 1
  • M. Sahraoui-Tahar
    • 1
  • M. Ari
    • 1
  • J. H. Davies
    • 2
  • M. Holland
    • 2
  • C. Stanley
    • 2
  • C. D. W. Wilkinson
    • 2
  1. 1.School of Physics and MaterialsUniversity of LancasterLancasterUK
  2. 2.Department of Electrical and Electronic EngineeringUniversity of GlasgowGlasgowUK

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