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Hyperfine interactions at nitrogen interstitial defects in diamond
Newcastle University.
Newcastle University.
Newcastle University.
Newcastle University.
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2013 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 25, no 6Article in journal (Refereed) Published
Abstract [en]

Diamond has many extreme physical properties and it can be used in a wide range of applications. In particular it is a highly effective particle detection material, where radiation damage is an important consideration. The WAR9 and WAR10 are electron paramagnetic resonance centres seen in irradiated, nitrogen-containing diamond. These S = 1/2 defects have C2v and C1h symmetry, respectively, and the experimental spectra have been interpreted as arising from nitrogen split-interstitial centres. Based upon the experimental and theoretical understanding of interstitial nitrogen defect structures, the AIMPRO density functional code has been used to assess the assignments for the structures of WAR9 and WAR10. Although the calculated hyperfine interaction tensors are consistent with the measured values for WAR9, the thermal stability renders the assignment problematic. The model for the WAR10 centre yields principal directions of the hyperfine tensor at variance with observation. Alternative models for both centres are discussed in this paper, but no convincing structures have been found.

Place, publisher, year, edition, pages
2013. Vol. 25, no 6
National Category
Computational Mathematics
Research subject
Scientific Computing
Identifiers
URN: urn:nbn:se:ltu:diva-4573DOI: 10.1088/0953-8984/25/6/065802ISI: 000313950600016Scopus ID: 2-s2.0-84872698343Local ID: 2899c48a-4f17-4199-9d73-74fdbcc5996fOAI: oai:DiVA.org:ltu-4573DiVA, id: diva2:977447
Note
Validerad; 2013; Bibliografisk uppgift: art. no. 065802; 20130114 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Rayson, Mark

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