Donor bound or negatively charged excitons in thin CdTe/Cd1xMnxTe quantum wells

N. Paganotto, J. Siviniant, D. Coquillat, D. Scalbert, J-P. Lascaray, and A. V. Kavokin
Phys. Rev. B 58, 4082 – Published 15 August 1998
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Abstract

Magnetophotoluminescence spectroscopy of unintentionally doped thin CdTe/(Cd,Mn)Te single and double quantum wells (QW’s) revealed a pronounced excitonic transition that can be associated with either an exciton bound to a neutral donor (D0X) or a negatively charged exciton (X). Comparative experimental study and theoretical analysis of this transition in quantum wells of different thicknesses allowed us to attribute it to the D0X complex in a single QW and to the X state in the double QW. A record X binding energy of 3.7 meV has been detected. The double QW structure was shown to be favorable for the formation of X in the wide well due to the efficient interwell electron tunneling.

  • Received 17 December 1997

DOI:https://doi.org/10.1103/PhysRevB.58.4082

©1998 American Physical Society

Authors & Affiliations

N. Paganotto, J. Siviniant, D. Coquillat, D. Scalbert, J-P. Lascaray, and A. V. Kavokin*

  • Groupe d’Etude des Semiconducteurs, UMR 5650 CNRS-Université de Montpellier II, Place Eugène Bataillon, 34095, Montpellier, France

  • *Also at Dipartimento di Ingeneria e Elettronica, Università di Roma II “Tor Vergata,” 1, via della Ricerca Scientifica, I-00133 Roma, Italy.

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Vol. 58, Iss. 7 — 15 August 1998

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