Interparticle interaction in spin-aligned and spin-degenerate exciton systems and magnetoplasmas in II-VI quantum wells

V. D. Kulakovskii, M. G. Tyazhlov, A. F. Dite, A. I. Filin, A. Forchel, D. R. Yakovlev, A. Waag, and G. Landwehr
Phys. Rev. B 54, 4981 – Published 15 August 1996
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Abstract

Magnetoluminescence studies of highly excited undoped CdTe/Cd0.88Mn0.12Te and Cd0.97Mn0.03Te/Cd0.75Mg0.25Te quantum wells (QW’s) have been carried out in magnetic fields up to 14 T at 4.2 K. Qualitatively different excitonic systems, spin aligned in (Cd,Mn)Te QW and spin depolarized in CdTe QW, have been generated. The interaction of spin-aligned excitons are found to be weakly repulsive. In contrast, an additional well pronounced emission line M has been found to appear at approximately 5 meV below the excitonic line in the spectra of the spin-degenerate system. This line is assigned to the emission of excitonic molecules consisting of excitons with different spins. Finally, we have shown that the renormalization of Landau-level transitions in dense electron-hole magnetoplasmas with several occupied Landau levels depends on their spin state, it is markedly weaker in the spin-polarized plasmas. © 1996 The American Physical Society.

  • Received 9 April 1996

DOI:https://doi.org/10.1103/PhysRevB.54.4981

©1996 American Physical Society

Authors & Affiliations

V. D. Kulakovskii, M. G. Tyazhlov, A. F. Dite, and A. I. Filin

  • Institute of Solid State Physics, 142432, Chernogolovka, Russia

A. Forchel, D. R. Yakovlev, A. Waag, and G. Landwehr

  • Würzburg University, Würzburg 97074, Federal Republic of Germany

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Vol. 54, Iss. 7 — 15 August 1996

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