Abstract
Modification of photoluminescence spectra taken from modulation doped CdTe/CdMgTe QW structures have been studied in magnetic fields up to 45T at high concentrations of 2D electrons. The following peculiarities were found in relatively low magnetic fields when filling factors v was higher than 2: (i) linear energy shift of the photoluminescence (PL) peak with increasing magnetic fields, (ii) periodic variation of PL intensities for σ− and σ+ circular polarizations, (iii) smooth jumps of the PL peak position at integer filing factors. In high magnetic fields the behavior of the PL specter of the heavily doped structure coincided with the behavior of the lightly doped one.
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