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High-field magnetoexcitons in unstrained GaAs/AlxGa1-xAs quantum dots

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  • Yosyp Sidor
  • Bart Partoens
  • Francois M. Peeters
  • Nele Schildermans
  • M Hayne
  • Victor V. Moshchalkov
  • Armando Rastelli
  • Oliver G. Schmidt
Article number155334
<mark>Journal publication date</mark>27/04/2006
<mark>Journal</mark>Physical review B
Issue number15
Number of pages8
Publication StatusPublished
<mark>Original language</mark>English


The magnetic field dependence of the excitonic states in unstrained GaAs/AlxGa1-xAs quantum dots is investigated theoretically and experimentally. The diamagnetic shift for the ground and the excited states are studied in magnetic fields of varying orientation. In the theoretical study, calculations are performed within the single band effective mass approximation, including band nonparabolicity, the full experimental three-dimensional dot shape and the electron-hole Coulomb interaction. These calculations are compared with the experimental results for both the ground and the excited states in fields up to 50 Tesla. Good agreement is found between theory and experiment.

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© 2006 The American Physical Society