Charged excitons trapped on monomolecular CdTe islands in wide ZnTe-(Zn,Mg)Te quantum wells

Thierry Taliercio, Pierre Lefebvre, Vincent Calvo, Denis Scalbert, Noël Magnea, Henry Mathieu, and Jacques Allègre
Phys. Rev. B 58, 15408 – Published 15 December 1998
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Abstract

Optical spectroscopy at T=2K reveals systematically a low-energy companion to the features of heavy- and light-hole excitons localized on CdTe 1-ML-high islands, buried in wide ZnTe/(Zn,Mg) Te quantum wells. These transitions are assigned to a negatively charged excitonic complex (trion) from magnetoreflectance and photoluminescence results. A mechanism of formation of the trion is proposed. A clear correlation is found between the exciton energies, which depend on the size and strain of the islands, and the trion binding energy, which varies between 1 and 3 meV.

  • Received 2 July 1998

DOI:https://doi.org/10.1103/PhysRevB.58.15408

©1998 American Physical Society

Authors & Affiliations

Thierry Taliercio, Pierre Lefebvre, Vincent Calvo, and Denis Scalbert

  • Groupe d’Etude des Semiconducteurs, CNRS, Université Montpellier II, Case courrier 074, 34095 Montpellier cedex 5, France

Noël Magnea

  • C.E.A. Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, SP2M. 17, avenue des Martyrs, 38054 Grenoble, France

Henry Mathieu and Jacques Allègre

  • Groupe d’Etude des Semiconducteurs, CNRS, Université Montpellier II, Case courrier 074, 34095 Montpellier cedex 5, France

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Issue

Vol. 58, Iss. 23 — 15 December 1998

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