MAGNETOPHONON RESONANCE AND INFRARED LATTICE REFLECTION

A parallel investigation was made of the magnetophonon resonance and i nfrared reflection spectra of p-type ZnSb single crystals [p approxima te to(1.5-3.0)X10(16) cm(-3)]. Magnetophonon oscillations were exhibit ed by the longitudinal and transverse magnetoresistance and by the Hal l effect in magnetic fields H less than or equal to 360 kOe oriented i n different ways relative to the crystal axes at temperatures 50-160 K . It was established that in the case of the H parallel to [100] and H parallel to [001] orientations the charge carriers interacted strongl y with two modes of longitudinal optical phonons, whereas in the H par allel to [010] orientation they interacted with three modes. A strong damping of the oscillation series and approach to the strong field con dition shifted the transverse magnetoresistance maxima relative to the resonance positions. A. comparison of the phonon frequencies deduced from the optical and transport data made it possible to identify the m odes interacting most strongly with carriers.