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HFI/NQI 2007 pp 155–159Cite as

The gap level of bond-centred muonium in diamond

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Abstract

Muonium, with a positive muon as the nucleus is considered a light isotope of hydrogen displaying a close chemical analogy to this atom. It offers a unique opportunity to study the behaviour of hydrogen in diamond at very low concentrations. The mass difference, however, implies that dynamical effects will be distinct. The bond centred muonium (Mu BC ) state in diamond is easily observed and there is a very good correlation between theoretical and experimental hyperfine parameters ((4)). Curiously, despite its predicted stability, the bond centred hydrogen state has not yet been observed in diamond. Following the discovery of hydrogen dopant states in certain wide band gap metal oxides, and the possibility of hydrogen related molecular dopants in diamond, the study of hydrogen in diamond is important. Although it is evident from its hyperfine parameters that (Mu BC ) is not a shallow donor, the question still arises as to where the (Mu BC ) state in diamond might lie in the band gap. Accordingly, measurements of the high temperature stability of (Mu BC ) have been performed in a search for its possible ionization. The results are consistent with such an ionization, as the disappearance of Mu BC polarisation (setting in near 1000 K) is correlated with the slight increase in the population of the diamagnetic μ+ species.

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Authors and Affiliations

  1. School of Physics, University of the Witwatersrand, PO WITS, Johannesburg, 2050, South Africa

    M. Madhuku & J. M. Keartland

  2. Physics Department, Durban University of Technology, Durban, 4001, South Africa

    D. Gxawu

  3. Department of Physics, University of Johannesburg, Johannesburg, 2006, South Africa

    S. H. Connell

  4. iThemba LABS-Gauteng, Johannesburg, 2050, South Africa

    I. Z. Machi

  5. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxfordshire, UK

    S. F. J. Cox & P. J. C. King

Authors
  1. M. Madhuku
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  2. D. Gxawu
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  3. S. H. Connell
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  4. I. Z. Machi
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  5. J. M. Keartland
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  6. S. F. J. Cox
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  7. P. J. C. King
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Corresponding author

Correspondence to S. H. Connell .

Editor information

Editors and Affiliations

  1. University of La Plata, La Plata, Argentina

    A. Pasquevich  & M. Rentería  & 

  2. Centro Brasileiro de Pesquisas Física, Rio de Janeiro, Brasil

    E. Baggio Saitovitch

  3. University of São Paulo, São Paulo, Brazil

    H. Petrilli

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Madhuku, M. et al. (2008). The gap level of bond-centred muonium in diamond. In: Pasquevich, A., Rentería, M., Saitovitch, E.B., Petrilli, H. (eds) HFI/NQI 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85320-6_24

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  • DOI: https://doi.org/10.1007/978-3-540-85320-6_24

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-85319-0

  • Online ISBN: 978-3-540-85320-6

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