Pseudoresonances in the Magnetophonon Structure of Nondegenerate Semiconductors

A new oscillatory behavior of semiconductor transport properties in quantizing magnetic fields is predicted on general arguments. The "pseudoresonances" are due to the pairing off of single-LO-phonon emission and absorption processes ending at the infinite density-of-states region. An exact calculation of Ohmic longitudinal magnetoresistance shows that at "high" temperatures, the pseudoresonance amplitudes are comparable to the usual magnetophonon resonances. The pseudoresonances have probably been seen, but attributed to 2LO-phonon scattering processes.