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Quantum Hall Effect in Wide Parabolic GaAs/AlxGa1−xAs Wells

  • E. G. Gwinn
  • P. F. Hopkins
  • A. J. Rimberg
  • R. M. Westervelt
  • M. Sundaram
  • A. C. Gossard
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 87)

Abstract

The ability to produce narrow two-dimensional (2D) layers of high mobility electron gas in semiconductor structures has permitted the study of the 2D electron gas in strong magnetic fields under nearly ideal conditions, and led to the discovery of the integer and fractional quantum Hall effects [1]. Despite many interesting experiments, comparable progress has not been made for the three dimensional (3D) electron gas in semiconductors, due in part to the strong influence of the potential from dopant atoms. Remotely-doped parabolic GaAs/A1xGa1−xAs wells can be used to produce relatively thick (>1000 Å) layers of high mobility electron gas [2, 3] which are spatially uniform due to the action of the parabolic potential. We report here high magnetic field measurements of both the 2D integer and fractional quantum Hall effects for a partially-filled wide parabolic GaAs/AlxGa1−xAs well [2] with very high low temperature mobility µ = 2.5x105 cm2/Vsec. These measurements demonstrate both the feasibility of the parabolic well technique and the high quality of the structures.

Keywords

Strong Magnetic Field Quantum Hall Effect Conduction Band Edge Hall Resistance Lower Landau Level 
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.
    See for example R.E. Prange and S.M. Girvin eds.: The Ouantum Hall Effect ( Springer Verlag, New York, 1987 )Google Scholar
  2. 2.
    M. Sundaram, A.C. Gossard, J.H. English, and R.M. Westervelt: Superlattices and Microstructures, in pressGoogle Scholar
  3. 3.
    B.I. Halperin, Japan J. of Appl. Phys. 26, Suppl. 26–3, 1913 (1987)Google Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • E. G. Gwinn
    • 1
  • P. F. Hopkins
    • 1
  • A. J. Rimberg
    • 1
  • R. M. Westervelt
    • 1
  • M. Sundaram
    • 2
  • A. C. Gossard
    • 2
  1. 1.Division of Applied Sciences and Department of PhysicsHarvard UniversityCambridgeUSA
  2. 2.Department of Electrical and Computer Engineering and Materials DepartmentUniversity of CaliforniaSanta BarbaraUSA

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