Magnetophonon Resonance in n–InP

Magnetophonon oscillations have been measured in the transverse magnetoresistance of high purity epitaxial n–InP using a magnetic field modulation technique. Resonance peaks up to N=9 are observed at temperatures between 100 and 250 K. The band edge effective mass is estimated to be 0.0815±0.0005 m at 110 k and 0.078±0.0005 m at 240 K. The temperature dependence of the effective mass is discussed using Kane's 3 band model and the momentum matrix element is determined to be P 2 =16.3 [eV].