Interaction of Surface Acoustic Waves with Two-Dimensional Electron Systems in GaAs / AlGaAs Heterojunctions

  • Achim Wixforth
Part of the NATO ASI Series book series (NSSB, volume 206)


The properties of quasi two-dimensional electron systems (2DES) as realized in space charge layers on semiconductors have been studied extensively during the last twenty years using various spectroscopic methods 1. A lot of the recent work on this field has only become possible due to the tremendous progress and success in the evaluation of growth techniques such as molecular beam epitaxy (MBE)2 and the improvements in material processing and lithography. Needless to mention, that also the physics and technology of semiconductor devices profits very strongly of these efforts. The discovery of the quantum Hall effect (QHE)3 as well as the fractional quantum Hall effect (FQHE)4 has led to a strong interest in the properties of a 2DES in high magnetic fields and at low temperatures. The amount of publications on this subject during the last few years demonstrate that there are still open questions and continuosly new questions and answers arise.


Sound Velocity Carrier Density High Magnetic Field Landau Level Quantum Hall Effect 
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Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • Achim Wixforth
    • 1
  1. 1.Institut f. Angewandte PhysikUnivers. HamburgHamburg 36F.R.Germany

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