The evidence for an enhancement of the polaron effect observed in magnetophonon resistance oscillations in CdTe

Abstract

Magnetophonon resistance oscillations have been observed with samples of high purity n-type CdTe. The positions of the resistance extrema are shifted away from the magnetic fields predicted from the known values of the frequency of the q = 0 longitudinal optical phonons and of the low-frequency effective mass. These deviations, which amount to 13% in the transverse orientation and to 6% in the longitudinal orientation, are provisionally attributed to the perturbation of the electronic Landau levels by the interaction with all longitudinal optical modes (the polaron effect).