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Magnetic resonance identification ofhydrogen at a zinc vacancy in ZnO
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Graduate School of Library, Information and Media Studies, University of Tsukuba, Tsukuba, Ibaraki 305-8550, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
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2013 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 25, 335804- p.Article in journal (Refereed) Published
Abstract [en]

Hydrogen (H) at a zinc vacancy (VZn) in ZnO is identified by electron paramagnetic resonance(EPR) and electron spin echo envelope modulation (ESEEM). In ZnO irradiated by 2 MeVelectrons, a doublet EPR spectrum, labelled S1, is observed. The doublet structure and theaccompanying weak satellites are shown to be the allowed and forbidden lines of the hyperfinestructure due to the dipolar interaction between an electron spin S D 1=2 and a nuclear spinI D 1=2 of 1H located at a VZn. The involvement of a single H atom in the S1 defect is furtherconfirmed by the observation of the nuclear Zeeman frequency of 1H in ESEEM experiments.We show that at a VZn, H prefers to make a short O–H bond with one O neighbour and is offthe substitutional site, forming a low symmetry C1 defect. In this partly H passivated VZn, the unpaired electron localizes on the p orbital of another O neighbour of VZn, and not on the H.

Place, publisher, year, edition, pages
2013. Vol. 25, 335804- p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-96765DOI: 10.1088/0953-8984/25/33/335804ISI: 000322512900017OAI: oai:DiVA.org:liu-96765DiVA: diva2:643257
Available from: 2013-08-26 Created: 2013-08-26 Last updated: 2017-12-06

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