Exciton Transfer in Multiple Quantum Well Structures of CdTe/CdMnTe Grown by Molecular Beam Epitaxy
M. Godlewski, M. Surma, Z. Wilamowski, T. Wojtowicz, G. Karczewski, J. Kossut
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland

P.O. Holtz, J.P. Bergman and B. Monemar
Department of Physics and Measurement Technology, Linköping University, 581 83 Linköping, Sweden
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The direct evidence for the efficient transfer of excitons from 4 nm and 6 nm to 10 nm wide CdTe quantum wells is presented based on the results of photoluminescence and photoluminescence excitation investigation. Efficient transfer is observed for quantum wells separated by thick (50 nm) CdMnTe barriers containing 10% or 30% Mn fraction. A new mechanism of the transfer is proposed, which involves long range dynamic magnetic interactions between free/bound excitons and Mn ions in the CdMnTe barrier regions of the structure.
DOI: 10.12693/APhysPolA.92.761
PACS numbers: 78.47.+p, 78.55.Et