Abstract
Photoluminescence (PL) studies of self-organized quantum dots (QDs) of Cd 1− x Mn x Te under magnetic fields were reported. Cd 1− x Mn x Te QDs were grown successfully in the composition range of x=0–10% on the ZnTe (1 0 0) surface by MBE. The PL spectra from capped Cd 1− x Mn x Te QDs were composed of two lines with a separation of about 20 meV at low temperatures. In the dependence on the temperature and magnetic field, the PL line in the lower-energy side exhibited peculiar behaviors, compared to that in the higher-energy side; with increasing temperature, the intensity of the lower-energy line was reduced rapidly and almost disappeared above 20 K , and Zeeman shift under magnetic fields was smaller and the degree of the circular polarization was larger and saturated at low magnetic fields. These features of the lower-energy line were discussed in relation to excitonic magnetic polaron in QDs.
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