Cyclotron resonance of carbon-doped two-dimensional hole systems: From the magnetic quantum limit to low magnetic fields

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Autor/in:
Erscheinungsjahr:
2009
Medientyp:
Text
Schlagworte:
  • Magnetic fields
  • Electron gas
  • Tilted magnetic
  • Insulators
  • Quantum Dots
  • Spin
  • Magnetic fields
  • Electron gas
  • Tilted magnetic
  • Insulators
  • Quantum Dots
  • Spin
Beschreibung:
  • We report on cyclotron resonance (CR) experiments of high-quality C-doped two-dimensional hole systems in GaAs/AlGaAs quantum wells covering the microwave and far-infrared regimes. At high magnetic field B we observe a strong B dependence of the cyclotron mass mc which can be reproduced by calculations based on a 4×4 Luttinger Hamiltonian in the axial approximation. At small B one main and up to three secondary CRs are found, which continuously evolve with smooth magnetic-field dependences. This has not been observed and predicted so far. In the regime of the magnetic quantum limit a further CR is observed, which can be attributed to a transition between Landau levels originating from the two different spin-split heavy- and light-hole subbands. © 2009 The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/2a82c9f3-6cbc-4eae-9cbf-2e6654ddae51