Ab initiopseudopotential calculations of optical-phonon deformation potentials in zinc-blende semiconductors

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Abstract
Ab initio pseudopotential calculations of optical-phonon deformation potentials (ODP) in zinc-blende semiconductors GaAs and GaP are carried out systematically. Good agreement between the calculated results and those from direct and indirect measurements is observed. This agreement is generally better than for previous calculations. The underestimate of ODP’s for most materials by previous empirical calculations can be due to neglect of valence-charge redistribution by optical deformation.