Abstract
This paper presents a reevaluation of the optical-phonon deformation potential constants near the gap of InSb. The absolute values of the deformation potentials , and , 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 ,=-16.2±4 eV and ,=32.9±8 eV. The study of the interference also provides information about the relative weight of different sources of forbidden LO-Raman scattering.
- Received 15 March 1985
DOI:https://doi.org/10.1103/PhysRevB.32.3966
©1985 American Physical Society