Magnetophonon resonance in n⁺n^-n⁺InP up to 40 T

Hot-electron magnetophoton resonances in micrometre size n+n-n+ InP structures are reported in crossed electric and magnetic fields in the temperature range from 110 to 230 K. The full series of quantum oscillation was studied up to the quantum number N=1 using pulsed high magnetic fields up to 40 T. The sign reversal of the oscillatory magnetoconductivity extrema from maxima to minima was observed with increasing electric field up to 3*104 V cm-1. The physical mechanism for the reversal of the extrema is interpreted in terms of the electric-field-induced inter-Landau level inelastic scattering of carriers by longitudinal optic phonons.