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Scaling Behaviour of Doped AlGaAs/GaAs Heterostructures in the Quantum Hall Regime

  • S. Koch
  • R. J. Haug
  • K. von Klitzing
  • K. Ploog
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 101)

Abstract

The influence of repulsive (Be) and attractive (Si) scattering centers close to the two dimensional electron gas of AlGaAs/GaAs heterostructures on characteristic transport properties has been studied. The temperature dependent halfwidth of the Shubnikov-de Haas-peaks ΔB (T) and the maximum of the slope of the Hall resistance δρxy /δB (T) between adjacent Hall plateaus have been investigated in the temperature range from 1.1K down to 40 mK. We have studied both delta-doped and homogeneously doped samples. In contrast to results reported for InGaAs/InP-heterostructures where a scaling exponent ϰ= 0.42± 0.04 with ΔB ∝ Tϰ and (δρxy /δB)max ∝ T−ϰ is found our data lead to scaling exponents which depend on the distribution and the density of the impurities. The values for ϰ are in the range of 0.36 to 0.81.

Keywords

Landau Level Hall Resistance Lower Landau Level Hall Resistivity Longitudinal Resistivity 
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. 1.
    H.P. Wei. D.C. Tsui, M.A. Paalanen, and A.M.M. Pruisken, Phys.Rev.Lett. 61, 1294 (1988).CrossRefGoogle Scholar
  2. 2.
    A.M.M. Pruisken, Phys.Rev.Lett. 61, 1297 (1988).CrossRefGoogle Scholar
  3. 3.
    K. Ploog, J. Cryst. Growth 81, 304 (1987).CrossRefGoogle Scholar
  4. 4.
    D.J. Thouless, Phys.Rev.Lett. 39, 1167 (1977).CrossRefGoogle Scholar
  5. 5.
    T. Ando and H. Aoki, J. Phys.Soc.Jpn. 54. 2238 (1985).CrossRefGoogle Scholar
  6. 6.
    B. Huckestein and B. Kramer, Phys.Rev.Lett. 64, 1437 (1990).CrossRefGoogle Scholar
  7. 7.
    S.A. Trugman. Phys.Rev.B 27. 7539 (1983).CrossRefGoogle Scholar
  8. 8.
    G.V. Mil’nikov and I.M. Sokolov, JETP Lett. 48. 536 (1988).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • S. Koch
    • 1
  • R. J. Haug
    • 1
  • K. von Klitzing
    • 1
  • K. Ploog
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80Germany

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