Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons
arXiv:cond-mat/0504569 · doi:10.1103/PhysRevB.72.125327
Abstract
We study interaction and radial polarization effects on the the absorption spectrum of neutral bound magnetoexcitons confined in quantum-ring structures. We show that the size and orientation of the exciton's dipole moment, as well as the interaction screening, play important roles in the Aharonov-Bohm oscillations. In particular, the excitonic absorption peaks display A-B oscillations both in position and amplitude for weak electron-hole interaction and large radial polarization. The presence of impurity scattering induces anticrossings in the exciton spectrum, leading to a modulation in the absorption strength. These properties could be used in experimental investigations of the effect in semiconductor quantum-ring structures.
Updated version, 6 pages, 4 figures. To appear in Phys. Rev. B
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- Finite Size Effects on the Optical Transitions in Quantum Rings under a Magnetic Field
- Non-circular semiconductor nanorings of type I and II: Emission kinetics in the exciton Aharonov-Bohm effect
- Coulomb interaction effects on the electronic structure of radial polarized excitons in nanorings
- Excited exciton and biexciton localised states in a single quantum ring
- Tuning terahertz transitions in a double-gated quantum ring
- Topology driven g-factor tuning in type-II quantum dots
- Disorder and Interactions in Graphene and other Quantum Systems