Positron lifetimes in ZnO single crystals

Brauer, Gerhard; Kuriplach, Jan; Cizek, Jakub; Anwand, Wolfgang; Melikhova, Oksana; Prochazka, Ivan; Skorupa, Wolfgang

Positron lifetimes in ZnO single crystals

Brauer, G.; Kuriplach, J.; Cizek, J.; Anwand, W.; Melikhova, O.; Prochazka, I.; Skorupa, W.

Analysis of positron lifetime data for ZnO single crystals suggests that four well-separated lifetime levels exist between those for the bulk and the Zn vacancy. Due to the hydrothermal growth conditions of most ZnO single crystals studied so far, it is postulated that a hydrogen-defect interaction could be responsible for this finding.

Keywords: ZnO; positron lifetime; vacancy defects; hydrogen-defect interaction

Vacuum 81(2007), 1314-1318

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