Optical Aharonov-Bohm effect in stacked type-II quantum dots

Igor L. Kuskovsky, W. MacDonald, A. O. Govorov, L. Mourokh, X. Wei, M. C. Tamargo, M. Tadic, and F. M. Peeters

Phys. Rev. B 76, 035342 – Published 31 July 2007

Abstract

Excitons in vertically stacked type-II quantum dots (QDs) experience a topological magnetic phase and demonstrate Aharonov-Bohm oscillations in emission intensity. The photoluminescence of vertically stacked $Zn Te ∕ Zn Se$ QDs is measured in magnetic fields up to $31 T$ . Aharonov-Bohm oscillations are found in the magnetic-field dependence of the emission intensity. The positions of the peaks of the emission intensity are in good agreement with numerical simulations of excitons in stacked QDs.

Received 15 February 2007

DOI:https://doi.org/10.1103/PhysRevB.76.035342

Authors & Affiliations

Igor L. Kuskovsky^1,*, W. MacDonald¹, A. O. Govorov², L. Mourokh¹, X. Wei³, M. C. Tamargo⁴, M. Tadic^5,6, and F. M. Peeters⁵

¹Department of Physics, Queens College of CUNY, Flushing, New York 11367, USA
²Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
³NHMFL, Tallahassee, Florida, 32310, USA
⁴Department of Chemistry, The City College of CUNY, New York, New York 10031, USA
⁵Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
⁶Faculty of Electrical Engineering, University of Belgrade, P.O. Box 3554, 11120 Belgrade, Serbia

^*Corresponding author. Igor.Kuskovsky@qc.cuny.edu

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Vol. 76, Iss. 3 — 15 July 2007

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