OPTICAL-PROPERTIES AND DYNAMIC BEHAVIOR OF LOCALIZED AND BOUND EXCITONS IN CD1-XMNXTE(X=4-PERCENT) GROWN BY MOLECULAR-BEAM EPITAXY

An epitaxial Cd1-xMnxTe(x=4%) layer has been grown on a CdTe buffer layer on a GaAs substrate by the molecular-beam-epitaxy method. Comparing the photoluminescence (PL) spectra of Cd1-xMnxTe with those of CdTe, two peaks in the Cd1-xMnxTe PL domain were assigned to localized and bound exciton emissions. The results obtained by PL measurements in magnetic fields up to 40 T support this assignment. The observed temporal energy shifts of the localized and bound exciton emissions can be attributed to localized and bound magnetic polaron formations, respectively. Comparing the temporal behavior of bound excitons in magnetic fields with that of localized excitons, a possible process of the bound magnetic polaron formation is discussed.