Étude des surstructures de la magnétorésistance de InSb

We have carried out experiments of magnetophonon resonance on n-InSb doped at 4.6 × 1013 cm−3 at a temperature of 135 K. The second derivative of longitudinal and transverse magnetoresistance exhibits obviously spin-resolved peaks of magnetophonon resonances involving one or two longitudinal optical phonons. Among these "over-structures" appear spin-flip resonances, particularly the 0−0+ resonance.The structures of the magnetoresistance are explained from the calculation of resonance fields, based on our method of determination of the Landau levels.