Optical exciton Aharonov-Bohm effect, persistent current, and magnetization in semiconductor nanorings of type I and II
arXiv:cond-mat/0511324 · doi:10.1103/PhysRevB.74.115416
Abstract
The optical exciton Aharonov-Bohm effect, i. e. an oscillatory component in the energy of optically active (bright) states, is investigated in nanorings. It is shown that a small effective electron mass, strong confinement of the electron, and high barrier for the hole, achieved e. g. by an InAs nanoring embedded in an AlGaSb quantum well, are favorable for observing the optical exciton Aharonov-Bohm effect. The second derivative of the exciton energy with respect to the magnetic field is utilized to extract Aharonov-Bohm oscillations even for the lowest bright state unambiguously. A connection between the theories for infinitesimal narrow and finite width rings is established. Furthermore, the magnetization is compared to the persistent current, which oscillates periodically with the magnetic field and confirms thus the non-trivial (connected) topology of the wave function in the nanoring.
12 pages, 11 figures
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Cited by in corpus (10)
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- Excitonic Aharonov-Bohm effect in a two-dimensional quantum ring
- Strain and band-mixing effects on the excitonic Aharonov-Bohm effect in In(Ga)As/GaAs ringlike quantum dots
- Non-circular semiconductor nanorings of type I and II: Emission kinetics in the exciton Aharonov-Bohm effect
- Microcavity polaritons in disordered exciton lattices
- Quantum-information theory of a Dirichlet ring with Aharonov-Bohm field
- The wave functions in the presence of constraints - Persistent Current in Coupled Rings
- Magneto-Optical Quantum Switching in a System of Spinor Excitons
- Disorder and Interactions in Graphene and other Quantum Systems