Calibration of the carbon localized vibrational mode absorption line in GaAs

Brozel, M. R.; Foulkes, E. J.; Series, R. W.; Hurle, D. T. J.
August 1986
Applied Physics Letters;8/11/1986, Vol. 49 Issue 6, p337
Academic Journal
The residual carbon acceptor concentration [CAs] in three radio-tin-doped, liquid encapsulated Czochralski, GaAs single crystals was estimated from a plot of carrier concentration versus tin concentration determined by radio-tracer counting. Local vibrational mode absorption of CAs in the samples was measured at room temperature and a calibration factor of 8±2×1015 cm-1 obtained. A comparison of this with other determinations suggests that the true calibration factor lies between 8 and 11×1015 cm-1 and that earlier, larger calibration factors should be discounted.


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