Crossing of Zeeman levels in quantum Hall systems of CdMnTe

Magnetoluminescence properties have been studied for 2 dimensional electron systems in a CdMnTe/CdMgTe single quantum well for dilute Mn concentration at high steady magnetic fields up to 35T. Singlet and triplet charged excitons are observed with varying the applied magnetic field, and a splitting of a luminescence peak based on the crossing of Zeeman levels have been found out around B = 12T. It is also found that anomalous photoluminescence peaks appear under the high magnetic field above B = 25T