Hydrogen at zinc vacancy of ZnO: an EPR and ESEEM study
2014 (English)In: International Conference on Defects in Semiconductors 2013: Proceedings of the 27th International Conference on Defectsin Semiconductors, ICDS-2013 / [ed] Anna Cavallini and Stefan K. Estreicher, American Institute of Physics (AIP), 2014, Vol. 1583, 341-344 p.Conference paper (Refereed)
An electron paramagnetic resonance (EPR) spectrum, labeled S1, with small-splitting doublet accompanied by weak satellites is observed in ZnO irradiated with 2 MeV electrons. The obtained structure is shown to be the hyperfine structure due to the dipolar interaction between an unpaired electron spin and a nuclear spin of hydrogen (H). The observation of the nuclear Zeeman frequency of H in electron spin echo envelope modulation experiments further confirmed the presence of a hydrogen atom in S1. From the observed spin-Hamiltonian parameters, S1 is identified to be the partly H-passivated Zn vacancy,V-Zn(-) H+, with the H+ ion making a short O-H bond with only one nearest O neighbor of V-Zn in the basal plane, being off the substitutional site, while the unpaired electron spin, which gives rise to the observed EPR signal, is localized on the p orbital of another O neighbor also in the basal plane.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2014. Vol. 1583, 341-344 p.
, AIP Conference Proceedings, ISSN 0094-243X ; 1583
ZnO, hydrogen, vacancies, hyperfine interaction, electron paramagnetic resonance.
IdentifiersURN: urn:nbn:se:liu:diva-111622DOI: 10.1063/1.4865666ISI: 000342321600074ISBN: 978-0-7354-1215-6OAI: oai:DiVA.org:liu-111622DiVA: diva2:758474
27th International Conference on Defects in Semiconductors (ICDS), 21–26 July 2013, Bologna, Italy