Magnetophotoluminescence of negatively charged excitons in narrow quantum wells

T. Vanhoucke, M. Hayne, M. Henini, and V. V. Moshchalkov
Phys. Rev. B 63, 125331 – Published 13 March 2001
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Abstract

We present the results of photoluminescence experiments on the negatively charged exciton X in GaAs/AlxGa1xAs quantum wells (QW) in high magnetic fields (<~50T). Three different QW widths are used here: 100, 120, and 150Å. All optically allowed transitions of X are observed, enabling us to experimentally verify its energy-level diagram. All samples behave consistently with this diagram. We have determined the binding energy Eb of the singlet and triplet state of X between 23 and 50 T for the 120 and 150ÅQW, while only the triplet Eb is observed for the 100ÅQW. A detailed comparison with recent theoretical calculations shows an agreement for all samples across this entire field range.

  • Received 27 October 2000

DOI:https://doi.org/10.1103/PhysRevB.63.125331

©2001 American Physical Society

Authors & Affiliations

T. Vanhoucke* and M. Hayne

  • Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

M. Henini

  • School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom

V. V. Moshchalkov

  • Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

  • *Email: tony.vanhoucke@fys.kuleuven.ac.be

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Vol. 63, Iss. 12 — 15 March 2001

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