Magnetic resonance identiﬁcation ofhydrogen at a zinc vacancy in ZnO
2013 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 25, 335804- p.Article in journal (Refereed) Published
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.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-96765DOI: 10.1088/0953-8984/25/33/335804ISI: 000322512900017OAI: oai:DiVA.org:liu-96765DiVA: diva2:643257