Low symmetry configurations of vacancy-oxygen complexes in irradiated silicon

被引：1
|
作者：
Kusano, Y. [1 ]
Saito, H. [1 ]
Vlasenko, L. S. [2 ]
Vlasenko, M. P. [2 ]
Ohta, E. [1 ]
Itoh, K. M. [1 ]
机构：
[1] Keio Univ, Sch Fundamental Sci & Technol, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan
[2] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
来源：
JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 24期
关键词：
PARAMAGNETIC RESONANCE; DEFECTS;
D O I：
10.1063/1.4938199
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Two new electron paramagnetic resonance (EPR) spectra, labeled KU2 and KU3, emerge as a result of annealing of gamma-ray irradiated silicon crystals in the temperature range 360-560 degrees 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. (C) 2015 AIP Publishing LLC.
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页数：5
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