Lattice dynamics and hyperfine interactions in ZnO and ZnSe at high external pressures.

@article{Karzel1996LatticeDA,
  title={Lattice dynamics and hyperfine interactions in ZnO and ZnSe at high external pressures.},
  author={Karzel and Potzel and K{\"o}fferlein and Schiessl and Steiner and Hiller and Kalvius and Joseph Ross Mitchell and B Das and Blaha and Thomas Schwarz and Pasternak},
  journal={Physical review. B, Condensed matter},
  year={1996},
  volume={53 17},
  pages={
          11425-11438
        }
}
The II-VI semiconductors ZnO and ZnSe have been investigated by x-ray and $^{67}\mathrm{ssbauer}$ spectroscopy at high external pressures. In ZnSe, the recoilfree fraction f increases from f=0.50% at ambient pressure to 1.19% at 6.1 GPa. It then decreases to f=0.92% as the pressure is further raised to 8.2 GPa. This decrease of f is caused by softening of phonon modes which occurs far below the crystallographic phase transition (13.5 GPa). In the high-pressure phase of ZnO (NaCl structure), low… CONTINUE READING
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