SwePub - sökning: L773:9780735412156

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1.	Son, Nguyen Tien, et al. (författare) Hydrogen at zinc vacancy of ZnO : an EPR and ESEEM study 2014 Ingår i: International Conference on Defects in Semiconductors 2013. - : American Institute of Physics (AIP). - 9780735412156 ; , s. 341-344 Konferensbidrag (refereegranskat)abstract 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.

Son, Nguyen Tien, et al. (författare)
Hydrogen at zinc vacancy of ZnO : an EPR and ESEEM study
2014
Ingår i: International Conference on Defects in Semiconductors 2013. - : American Institute of Physics (AIP). - 9780735412156 ; , s. 341-344
Konferensbidrag (refereegranskat)abstract
- 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.

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