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Exciton Aharonov-Bohm effect in type I and II nanorings | | M. Grochol
; F. Grosse
; R. Zimmermann
; | | Date: |
14 Nov 2005 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | | Abstract: | The exciton Aharanov-Bohm effect, i.e. an oscillatory energy dependence on the magnetic field, is predicted for semiconductor nanorings. Absorption spectra for realistic ring geometries and material parameters for type I and type II band alignments are calculated. The oscillation amplitude is found to be larger for type II nanorings and increases with decreasing the ring radius. The numerical results are interpreted within a simplified model of infinitely narrow rings. In specific type II nanorings the effective hole position changes from the center of the ring to the outside by increasing the magnetic field for the energetically lowest optically active state. Possible strategies to overcome difficulties in observing experimentally this effect are proposed. | | Source: | arXiv, cond-mat/0511324 | | Services: | Forum | Review | PDF | Favorites | |
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