Transverse Magnetophonon Resonance in n-GaAs under Pulsed High Magnetic Fields

Abstract

Magnetophonon resonance of high purity epitaxial n-type GaAs was investigated in the configuration of j⊥B at various temperatures from 77 to 303 K using pulsed high magnetic fields up to 30 T. In the high magnetic field and low temperature region, a nonlinear increase of the amplitude againt the field was clearly observed in the resonant oscillation. A relation between the damping factor and the magnetic field was determined to be γ∝B^2⁄3 from our experiment, which suggests that the electron-phonon scattering is the dominant process for the damping at high magnetic field according to the Barker’s theory.