Magneto-Optical Measurements on the 0.839 eV Emission in GaAs:Cr

  • N. Killoran
  • B. C. Cavenett
  • W. E. Hagston


The origin of the 0.839 eV emission in semi-insulating GaAs:Cr has been investigated by optically detected magnetic resonance (ODMR) and Zeeman spectroscopy on the zero phonon line and satellites. The Zeeman measurements have been carried out for B∥<111>, <110> and <100> as well as angular dependence of the splittings in the (110) plane. The results show that the centre has a symmetry axis along the < 111> direction, with a small orthorhombic distortion and these conclusions are in agreement with the ODMR signal angular dependence. The experiments show that the emission does not arise from the <100> Jahn-Teller distorted Cr2+ centre observed in EPR but is due to a <111> centre such as that suggested by White where an exciton recombines at a (Cr2+-D+) pair.


Angular Dependence Zeeman Splitting Optically Detect Magnetic Resonance Defect Axis Optically Detect Magnetic Resonance Spectrum 


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  1. 1.
    Krebs, J.J. and Stauss, G.H. (1977). Phys. Rev. B, 16, 971CrossRefGoogle Scholar
  2. 2.
    White, A.M., Krebs, J.J. and Stauss, G.H. (1980). Solid St. Commun., in pressGoogle Scholar
  3. 3.
    Wagner, R.J. and White, A.M. (1979). Solid St. Commun., 32, 399CrossRefGoogle Scholar
  4. 4.
    Koschel, W.H., Bishop, S.G. and McCombe, B.D. (1976). Solid St. Commun., 19, 521CrossRefGoogle Scholar
  5. 5.
    Stocker, H.J. and Schmidt, M. (1976). J. Appl. Phys., 47, 2450CrossRefGoogle Scholar
  6. 6.
    Lightowlers, E.C. and Penchina, C.M. (1978). J. Phys. C, 11, L405CrossRefGoogle Scholar
  7. 7.
    Lightowlers, E.C., Henry, M.O. and Penchina, C.M. (1978). Inst. Phys. Conf. Ser., 43, 307Google Scholar
  8. 8.
    Valiin, J.T., Slack, G.A., Roberts, S. and Hughes, A.E. (1970). Phys. Rev. B, 2, 4313CrossRefGoogle Scholar
  9. 9.
    White, A.M. (1979). Solid St. Commun., 32, 205CrossRefGoogle Scholar
  10. 10.
    Henry, C.H., Dean, P.J. and Cuthbert, J.D. (1968). Phys. Rev., 166, 754CrossRefGoogle Scholar
  11. 11.
    Title, R.S. (1967). The Physics and Chemistry of II–VI Compounds (Eds M. Aven and J.S. Prener), ch. 6. Amsterdam; North HollandGoogle Scholar
  12. 12.
    Nicholls, J.E., Davies, J.J., Cavenett, B.C. and Dunstan, D.J. (1979). J. Phys. C, 12, 361CrossRefGoogle Scholar
  13. 13.
    Cavenett, B.C. (1978). Luminescence Spectroscopy (Ed. M.D. Lumb), ch. 5. London; Academic PressGoogle Scholar
  14. 14.
    Cavenett, B.C. Advances in Physics, to be publishedGoogle Scholar

Copyright information

© N. Killoran, B.C. Cavenett and W.E. Hagston 1980

Authors and Affiliations

  • N. Killoran
    • 1
  • B. C. Cavenett
    • 1
  • W. E. Hagston
    • 1
  1. 1.Department of PhysicsUniversity of HullHullUK

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