中国物理B ›› 1993, Vol. 2 ›› Issue (3): 213-219.doi: 10.1088/1004-423X/2/3/007

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PHOTOCONDUCTIVITY OF Cd0.7Mn0.3Se

姜山a, 沈学础a, 马可军b   

  • 收稿日期:1991-12-23 出版日期:1993-03-20 发布日期:1993-03-20
  • 基金资助:
    Project supported by the National Center for Research and Development on Superconductivity of China.

PHOTOCONDUCTIVITY OF Cd0.7Mn0.3Se

JIANG SHAN (姜山)a, SHEN XUE-CHU (沈学础)a, MA KE-JUN (马可军)b   

  1. 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
  • Received:1991-12-23 Online:1993-03-20 Published:1993-03-20

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摘要： The photoconductivity spectra of semimagnetic semiconductor Cd0.7Mn0.3Se have been measured at 50-300 K and in the wavelength range of 5500 ? to 8000 ?. 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.

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.

中图分类号: 

  • 7240