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Spectral Blue-Shifts in Optical Absorption and Emission of the 2D Electron System in the Magnetic Quantum Limit

  • D. Heiman
  • B. B. Goldberg
  • A. Pinczuk
  • C. W. Tu
  • J. H. English
  • A. C. Gossard
  • D. A. Broido
  • M. Santos
  • M. Shayegan
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 87)

Abstract

The 2D electron system in GaAs quantum wells was investigated using optical absorption and photoluminescence measurements in the bandgap region, for magnetic fields B≦30 T and temperatures T≧0.4 K. Several optical anomalies appear as spectral blue-shifts for both increasing field and decreasing temperature, and are related to electron-electron interactions. The anomalies observed at the 2D Landau filling factors ν⋍1 and ν<2/3 have very different field and temperature dependencies. The one near ν=1 is associated with changes in population of the lowest spin-split Landau level. The ones at higher fields are observed only for T<3 K, concurrent with the fractional quantum Hall effect.

Keywords

Filling Factor Landau Level Multiple Quantum Well Spin Splitting 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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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • D. Heiman
    • 1
  • B. B. Goldberg
    • 1
  • A. Pinczuk
    • 2
  • C. W. Tu
    • 2
  • J. H. English
    • 2
  • A. C. Gossard
    • 2
  • D. A. Broido
    • 3
  • M. Santos
    • 4
  • M. Shayegan
    • 4
  1. 1.National Magnet Lab.Massachusetts Institute of TechnologyCambridgeUSA
  2. 2.AT&T Bell Labs.Murray HillUSA
  3. 3.Department of PhysicsBoston CollegeChestnut HillUSA
  4. 4.Department of Electrical EngineeringPrinceton UniversityPrincetonUSA

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