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Phonon Shifts and Strains in Strained-Layer (Ga1−xInx)As

Published online by Cambridge University Press:  26 February 2011

Gerald Burns
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598
C. R. Wie
Affiliation:
Dept. of Elect. and Computer Eng. SUNY at Buffalo Amherst, NY 14260
F. H. Dacol
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598
G. D. Pettit
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598
J. M. Woodall
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598
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Abstract

For thin (Ga1−xInx)As films on GaAs (100) substrates we have measured the phonon frequencies (Raninn technique) and the strains (x-ray rocking curve technique). The films range from perfect epitaxial (the thinner films) to those that have relaxed by different amounts (thicker films). Using the measured strains and the phonon deformation constants, the strain-induced frequency shift was calculated for each sample. From the measurements and calculation, we find that the frequency shifts due to strain give equivalent bulk phonon frequencies that are in good agreement with each other. This indicates that the Raman technique can be used for in-situ monitoring of the growth process.

Type
Research Article
Copyright
Copyright © Materials Research Society 1988

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References

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