Low symmetry configurations of vacancy-oxygen complexes in irradiated silicon

Y. Kusano, H. Saito, L. S. Vlasenko, M. P. Vlasenko, Eiji Ohta, K. M. Itoh

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1 Citation (Scopus)


Two new electron paramagnetic resonance (EPR) spectra, labeled KU2 and KU3, emerge as a result of annealing of γ-ray irradiated silicon crystals in the temperature range 360-560 °C. The EPR intensities of KU2 and KU3 increase in the upper range of the annealing temperature where the EPR peaks of the vacancy-oxygen complex (A-center) diminish. The angular dependence study shows that the EPR spectra of KU2 and KU3 resemble that of SL1, the excited triplet (spin S = 1) state of A-centers, but with slightly different g and D-tensors representing lowering in symmetries. Microscopic lattice distortions caused by capturing of extra interstitial oxygen atoms by the A-centers are proposed to be the source of lowering of the symmetries associated with KU2 and KU3.

Original languageEnglish
Article number245703
JournalJournal of Applied Physics
Issue number24
Publication statusPublished - 2015 Dec 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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