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Electron-Nuclear Double Resonance Study of the Zinc Vacancy in Zinc GERMANIUM PHOSPHIDE (ZnGeP2)

  • K. T. Stevens (a1), S. D. Setzler (a1), L. E. Halliburton (a1), N. C. Fernelius (a2), P. G. Schunemann (a3) and T. M. Pollak (a3)...

Abstract

As-grown crystals of ZnGeP2 are highly compensated and contain significant concentrations of donors and acceptors. The dominant acceptor in ZnGeP2 is believed to be the zinc vacancy. This center is paramagnetic in its normal singly ionized state, and gives rise to an electron paramagnetic resonance (EPR) signal characterized by a resolved primary hyperfine interaction with two equivalent phosphorus nuclei adjacent to the vacancy. The present investigation has focused on electron-nuclear double resonance (ENDOR) measurements of additional hyperfine interactions which are not resolved in the regular EPR spectra. Principal values and principal axes directions for four additional phosphorus nuclei are determined from the ENDOR angular dependence. These parameters support the zinc-vacancy assignment for the acceptor and they provide an experimental check of wave functions generated in future computational modeling efforts.

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References

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1. Barnes, N. P., in Tunable Lasers Handbook, edited by Duarte, F. J. (Academic Press, New York, 1995), Chapter 7, pp. 293348.
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MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
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