Exciton Dynamics in ZnTe Based Semimagnetic Semiconductors and CdMnTe Quantum Wells
Nguyen The Khoi, J.A. Gaj
Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

G. Karczewski, T. Wojtowicz, J. Kossut
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

and M. Demianiuk
Institute of Technical Physics, Military Academy of Technology, Kaliskiego 2, 00-908 Warszawa, Poland
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Inelastic scattering of excitons on LO phonons in ZnTe based bulk semimagnetic semiconductors with low concentration of paramagnetic ions (Mn2+, Fe2+ and Cr2+) was studied. A polarization degree of the LO phonon Raman lines was measured as a function of the exciton splitting in a magnetic field, and allowed us to determine the polarization lifetime (polariton flight time). A similar method was used to investigate multiple Mn2+ spin-flip scattering in CdMnTe quantum well. The cascade model seems to be not adequate to interpret the dependence of the polarization degree on the order of scattering.
DOI: 10.12693/APhysPolA.90.899
PACS numbers: 75.50.Pp, 78.66.Hf, 73.20.Dx