Electric-Field-Induced Raman Scattering by LO Phonons in an External Magnetic Field

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Abstract
A calculation of the electro-optic (Fröhlich-interaction) contribution to the electric-field-induced Raman-scattering tensor of LO phonons in a crossed magnetic field is presented for "two-band" scattering processes involving continuum electron and hole intermediate states. The continuum states in crossed electric and magnetic fields can be described by harmonic-oscillator wave functions. The intraband-Fröhlich-interaction matrix element is found to be directly proportional to the average separation of electron and hole in the intermediate state, a result similar to that for electric-field-induced scattering via discrete exciton states in no magnetic field.