Abstract
This paper presents a reevaluation of the optical-phonon deformation potential constants near the ${E}_{1}$ gap of InSb. The absolute values of the deformation potentials ${d}_{1}$,${0}^{5}$ and ${d}_{3}$,${0}^{5}$ are obtained from a measurement of the Raman efficiency for allowed LO-phonon scattering and a fit of previous uniaxial-stress experiments by using new ellipsometric data for the optical susceptibility. The signs of the deformation potentials are deduced from a study of the interference between the amplitudes for forbidden and allowed LO-Raman scattering. The values obtained are ${d}_{1}$,${0}^{5}$=-16.2\ifmmode\pm\else\textpm\fi{}4 eV and ${d}_{3}$,${0}^{5}$=32.9\ifmmode\pm\else\textpm\fi{}8 eV. The study of the interference also provides information about the relative weight of different sources of forbidden LO-Raman scattering.
Published Version
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