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Long‐wavelength lattice dynamics of GaxIn1-xAsySb1-y quaternary alloys

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3 Author(s)
Jaw, D.H. ; Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112 ; Cherng, Y.T. ; Stringfellow, G.B.

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The quaternary semiconductor alloy GaxIn1-xAsySb1-y has been investigated using Raman scattering spectroscopy in the spectral region from 150 to 300 cm-1 at room temperature. The Raman spectra exhibit two‐ or three‐mode behavior depending on the composition. A modified random‐element isodisplacement model is used to describe the behavior of the optical phonons. The calculations of the dependence of the long‐wavelength optical phonon frequencies on the composition are in good agreement with the experimental results.

Published in:

Journal of Applied Physics  (Volume:66 ,  Issue: 5 )

Date of Publication:

Sep 1989

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