Magneto-Excitons in CdTe/(CdMn)Te Quantum Wells

  • W. Ossau
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 101)

Abstract

We have performed low temperature photoluminescence and photoluminescence excitation measurements on CdTe/(CdMn)Te single quantum wells in magnetic fields up to 9.5 T. The analysis of the temperature and magnetic field dependence of the splitting of the heavy-hole exciton in Faraday configuration shows that the splitting of the exciton in the nonmagnetic layer is caused by exchange interaction with the Mn++ ions in the barrier. From the asymmetric behaviour of the splitting of the heavy-hole excitonic recombination we identify a Type-I to Type-II transition of heterostructures with small manganese concentration in the barrier. The asymmetric splitting furthermore allows to determine the valence band offset to 20 ± 5 % of the total bandgap discontinuity. In addition we deduce from the finestructure of the spectra the binding energy of the heavy-hole exciton as a function of the well width.

Keywords

Anisotropy Manganese Recombination GaAs ZnSe 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • W. Ossau
    • 1
  1. 1.Physikalisches InstitutUniversität WürzburgWürzburgGermany

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