Temperature dependence of local vibrational mode optical absorption for carbon acceptors in GaAs
- 13 March 1989
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (11) , 1013-1015
- https://doi.org/10.1063/1.100783
Abstract
The local vibrational mode (LVM) absorption band due to CAs in GaAs is reported for three semi-insulating samples at room temperature and for T<77 K. Data obtained by Fourier transform infrared spectroscopy at resolution values from 1.0 to 0.1 cm−1 indicate that the area of the carbon LVM band increases by ∼60% upon cooling from room temperature, a substantially larger increase than some accounts have suggested. Our recommended value for the calibration factor f in going from LVM band area to carbon concentration is fRT≂1.6fLT ≂(13±3)×1015 cm−1.Keywords
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