Abstract
We studied pressure and magnetic field effects on the exciton states in a 1.0nm thick CdTe/Cd1−xMnxTe (x=0.4) single quantum well at T=4K to B=60T and P=1.9GPa, using a motor generator driven long pulsed magnet and a diamond anvil cell with a plastic body. Complete extinction of the exciton emission was observed with increasing a pressure to 1.6GPa. The emission was found to recover at about 2.17eV by the application of a magnetic field of 7T and became stronger with increasing the field. When the pressure was increased to 1.9GPa, the recovery occurred at about 2.15GPa by a field of 40T. Analysis of pressure and magnetic field dependence of the emission peak profiles suggests that the novel phenomena are related to excitonic energy transfer from the quantum well to Mn2+ 3d electrons in the barrier.
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