Optically detected magnetic resonance of epitaxial nitrogen-doped ZnO

G N Aliev, S J Bingham, D Wolverson, J J Davies, H Makino, H J Ko, T Yao

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19 Citations (Scopus)

Abstract

Optically detected magnetic resonance (ODMR) experiments on epitaxial nitrogen-doped ZnO show spectra due to (i) a shallow donor with the full wurtzite symmetry, (ii) a previously unobserved spin-1/2 center of axial symmetry whose principal axis is tilted slightly away from the crystal c axis, and (iii) a spin–1 triplet state of orthorhombic symmetry. The spin-1/2 center has a g tensor that is of a different form from that of previously reported ODMR spectra for ZnO and is consistent with a model that contains a zinc interstitial, possibly in association with a nitrogen atom. The g values for the triplet state are the average of those for a shallow donor and the spin-1/2 center, and the spectrum is thus assigned to a pair of such centers strongly coupled by a spin-exchange interaction.
Original languageEnglish
Article number115206
JournalPhysical Review B
Volume70
Issue number11
DOIs
Publication statusPublished - 2004

Keywords

  • semiconductor doping
  • impurities
  • wide band gap semiconductors
  • semiconductor epitaxial layers
  • photoluminescence
  • microwave-optical double resonance
  • exchange interactions (electron)
  • interstitials
  • II-VI semiconductors
  • nitrogen
  • zinc compounds

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