Raman scattering in InP1-xAsxalloys
- 20 February 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (5) , 899-910
- https://doi.org/10.1088/0022-3719/13/5/020
Abstract
Phonons in the alloy system InP1-xAsx have been studied by Raman spectroscopy. Long-wavelength optical phonons display a two-mode behaviour throughout the whole composition range. The frequencies of the local and gap modes found experimentally at 77K are given. Short-wavelength phonons proceed from second-order processes near x=0 and 1 and from first-order disorder-induced scattering around x=0.5. This latter mechanism explains the two features around 55 cm-1 and 145 cm-1. They are attributed to the maxima of the density of transverse and longitudinal acoustic bands.Keywords
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