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Identification of the Nitrogen Split Interstitial

H. J. von Bardeleben 1 J. L. Cantin 1 U. Gerstmann A. Scholle S. Greulich-Weber E. Rauls M. Landmann W. G. Schmidt A. Gentils 2 J. Botsoa 3 M. F. Barthe 3 
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : Combining electron paramagnetic resonance, density functional theory, and positron annihilation spectroscopy (PAS), we identify the nitrogen interstitial defect in GaN. The isolated interstitial is unstable and transforms into a split interstitial configuration (N-N)N. It is generated by particle irradiation with an introduction rate of a primary defect, pins the Fermi level at EC-1.0 eV for high fluences, and anneals out at 400 °C. The associated defect, the nitrogen vacancy, is observed by PAS only in the initial stage of irradiation.
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H. J. von Bardeleben, J. L. Cantin, U. Gerstmann, A. Scholle, S. Greulich-Weber, et al.. Identification of the Nitrogen Split Interstitial. Physical Review Letters, American Physical Society, 2012, 102, pp.206402. ⟨10.1103/PhysRevLett.109.206402⟩. ⟨in2p3-00771409⟩



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