Assessment of oxygen in gallium arsenide by infrared local vibrational mode spectroscopy
- 10 April 1989
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (15) , 1442-1444
- https://doi.org/10.1063/1.100691
Abstract
Two infrared local vibrational mode (LVM) absorption lines occurring at 715 and 845 cm−1 shift to 679 and 802 cm−1 in gallium arsenide doped with 18O, proving that the lines arise from the vibrations of oxygen impurities. The 715 cm−1 line exhibits a triplet 69,71Ga isotope fine structure consistent with that expected from a quasi‐substitional VAs‐O center. The 845 cm−1 line appears as a closely spaced doublet expected for a bonded interstitial oxygen atom.Keywords
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