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Article Dans Une Revue Nano Letters Année : 2016

Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring

Résumé

The Aharonov-Bohm effect in ring structures in the presence of electronic correlation and disorder is an open issue. We report novel oscillations of a strongly correlated exciton pair, similar to a Wigner molecule, in a single nanoquantum ring, where the emission energy changes abruptly at the transition magnetic field with a fractional oscillation period compared to that of the exciton, a so-called fractional optical Aharonov-Bohm oscillation. We have also observed modulated optical Aharonov-Bohm oscillations of an electron–hole pair and an anticrossing of the photoluminescence spectrum at the transition magnetic field, which are associated with disorder effects such as localization, built-in electric field, and impurities.
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Dates et versions

hal-01399195 , version 1 (18-11-2016)

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Hee Dae Kim, Rin Okuyama, Kwangseuk Kyhm, Mikio Eto, Robert A. Taylor, et al.. Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring. Nano Letters, 2016, 16 (1), pp.27 - 33. ⟨10.1021/acs.nanolett.5b02419⟩. ⟨hal-01399195⟩
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