JIANG SHAN (姜山)a, SHEN XUE-CHU (沈学础)a, MA KE-JUN (马可军)b
a Center of Condensed Matter and Radiation Physics. CCAST (world Laboratory), P O. Box 8730, Beijing 100080, China; bNational Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Academia Sinica, Shanghai 200083, China
Abstract The photoconductivity spectra of semimagnetic semiconductor Cd0.7Mn0.3Se have been measured at 50-300 K and in the wavelength range of 5500A to 8000A. It is found that the energy gap of Cd0.7Mn0.3Se changes with the temperature linearly, and the temperature coefficient (dEg/dT) is about -7×10-4 eV/K. A photoconductivity peak which is related to Mn2+ is also found. This peak is located around 1.85 eV, nearly unshifted with variation of the temperature. The possible transition mechanisms in Cd1-xMnxSe have been discussed in the light of group theory and crystal field theory, and the results are in good agreement with experiments.
Received: 23 December 1991
Accepted manuscript online:
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