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Original Paper
Infrared absorption spectroscopy of a carbon–oxygen complex in gallium arsenide
Article first published online: 23 OCT 2012
DOI: 10.1002/pssb.201248350
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Alt, H. Ch., Kersch, A. and Wagner, H. E. (2013), Infrared absorption spectroscopy of a carbon–oxygen complex in gallium arsenide. Phys. Status Solidi B, 250: 324–328. doi: 10.1002/pssb.201248350
Publication History
- Issue published online: 7 FEB 2013
- Article first published online: 23 OCT 2012
- Manuscript Accepted: 4 OCT 2012
- Manuscript Revised: 2 OCT 2012
- Manuscript Received: 2 AUG 2012
- Abstract
- Article
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Keywords:
- carbon;
- defects;
- gallium arsenide;
- infrared absorption;
- oxygen;
- uniaxial stress
Abstract
Infrared absorption measurements have been carried out on a carbon–oxygen complex in gallium arsenide. The stretching mode at 2059.6 cm−1 has been investigated at low temperatures with polarized light under uniaxial stress in the 〈100〉, 〈111〉, and 〈110〉 crystallographic directions. The splitting behavior due to lifting of orientational degeneracy shows that the center has tetragonal symmetry. The intensity of the isotope shifted satellite band caused by the naturally abundant 18O isotope is not in agreement with the identification as a simple CO-molecule. The number of incorporated oxygen atoms is 3 ± 1. The assignment of the defect to a CO2 molecule is in agreement with the experimental data available so far.