Magnetophonon oscillations in tellurium under hot carrier conditions

The magnetoresistance of undoped tellurium crystals was measured at lattice temperatures below 4.2 K and magnetic fields up to 15 T. Under hot carrier conditions two series of magnetophonon oscillations in the longitudinal magnetoresistance with the c-axis perpendicular to the magnetic field direction were observed. On the basis of the known band parameters and an impurity binding energy of 1.4 meV, the results are explained with the capture of warm carriers at impurity sites under optical phonon emission.