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Far-Infrared Spectroscopy of Two-Dimensional Electronic Systems with Tunable Charge Density

  • Detlef Heitmann
  • Klaus Ensslin
Chapter
Part of the NATO ASI Series book series (NSSB, volume 254)

Abstract

Mesoscopic electronic systems, i.e. systems in the intermediate regime between totally classical and totally quantized behavior are very often studied in two-dimensional electronic systems (2 DES). 2 DES can be realized in semiconductor heterostructures or in metal-oxide-semiconductor (MOS) systems. They have attracted a great interest in the last decade [1]. This interest arose from many proposed and realized technical applications and — in an interacting way — also from fundamental physical investigations. In these systems many of the interesting physical properties can be tailored during the fabrication process and, for a particular sample, varied over a wide range via electric or magnetic fields, stress, temperature, etc. This allows very detailed studies of fundamental physical properties and of interactions that are unique to the 2 D system. For the investigation of mesoscopic effects it is advantageous that laterally confined electron systems in 2D samples can be tuned, e.g. via a gate voltage, from a macroscopic systems through the mesoscopic regime into the quantized regime. Further, a very sensitive and reproducible adjustment of e.g. the Fermi energy or other parameters is easily possible.

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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • Detlef Heitmann
    • 1
  • Klaus Ensslin
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80F. R. Germany

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