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, and T. Yao
Phys. Rev. B 70, 115206 – Published 16 September 2004

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-12 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-12 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-12 center, and the spectrum is thus assigned to a pair of such centers strongly coupled by a spin-exchange interaction.

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  • Received 16 April 2004

DOI:https://doi.org/10.1103/PhysRevB.70.115206

©2004 American Physical Society

Authors & Affiliations

G. N. Aliev, S. J. Bingham, D. Wolverson*, and J. J. Davies

  • Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom

H. Makino, H. J. Ko, and T. Yao

  • Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980, Japan

  • *Electronic address: d.wolverson@bath.ac.uk; URL: http://staff.bath.ac.uk/pysdw

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Vol. 70, Iss. 11 — 15 September 2004

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