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)


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.


Filling Factor Landau Level Multiple Quantum Well Spin Splitting Lower Landau Level 
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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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