Local structure and defects in ion irradiated KTaO3

Journal of Physics. Condensed Matter : an Institute of Physics Journal
F X ZhangW J Weber

Abstract

The modification of the local structure in cubic perovskite KTaO3 irradiated with 3 MeV and 1.1 GeV Au ions is studied by Raman and x-ray absorption spectroscopy, complemented by density functional theory (DFT) calculations. In the case of irradiation with 3 MeV Au ions where displacement cascade processes are dominant, the Ta L3-edge x-ray absorption measurements suggest that a peak corresponding to the Ta-O bonds in the TaO6 octahedra splits, which is attributed to the formation of TaK antisite defects that are coupled with oxygen vacancies, V O. This finding is consistent with the DFT calculations. Under irradiation with 1.1 GeV ions, the intense ionization and electronic energy deposition lead to a blue shift and an intensity reduction of active Raman bands. In the case of sequential irradiations, extended x-ray absorption fine structure measurements reveal a decrease in concentration of coupled TaK-V O defects under subsequent irradiation with 1.1 GeV Au ions.

References

Nov 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Aug 16, 2000·Acta Crystallographica. Section B, Structural Science·I P ZibrovP E Werner
Jun 22, 2005·Journal of Synchrotron Radiation·B Ravel, M Newville
Jun 4, 2008·Physical Review Letters·John P PerdewKieron Burke
Jan 13, 2015·Scientific Reports·William J WeberYanwen Zhang
Aug 13, 2015·Nature Communications·Yanwen ZhangWilliam J Weber
May 25, 2016·Scientific Reports·A HerklotzT Z Ward
Feb 15, 2017·Physical Chemistry Chemical Physics : PCCP·Jianqi XiWilliam J Weber
Jun 6, 2017·Physical Review Letters·F X ZhangYanwen Zhang

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Citations

Aug 29, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Yi RenGuanghui Zhou

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