High-field magneto-excitons in unstrained GaAs/AlGaAs quantum dots

Details High-field magneto-excitons in unstrained GaAs/AlGaAs quantum dots High-field magneto-excitons in unstrained GaAs/AlGaAs quantum dots

2006-05-09

arxiv.org/abs/cond-mat/0605223v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 9 figures. To appear in Physical Review B

Scientific paper

10.1103/PhysRevB.73.155334

The magnetic field dependence of the excitonic states in unstrained GaAs/AlGaAs 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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