Magnetophonon Resonance of Hot Electrons in n-InSb at 77K

概要

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Magnetophonon resonances, which were first predicted by Gurevich and Firsov, have been observed in the hot electron mobility in pere n-InSb. The resonance experiment was carried out at 77K in transverse magnetic field up to 22kG with application of sufficiently small electric field to produce a slight change in the electron mobility. The quantity β in the formula μ=μ_0(1-βE^2) was measured with extremely good accuracy (？μ/μ_0∼10^<-7>) by adopting a bridge circuit. The minima in the quantity |β| were observed at magnetic fields, B=17.5, 11.3, 8.35, 6.89, 5.72, 4.12, 3.68, ,3.72, and 2.93kG. These resonance extrema are attributed to resonant cooling of hot electrons due to optical phonon induced transitions from the high energy tail of the electron distribution near k_z=0 at higher Landau levels to lower Landau levels. The extremal positions are well explained by taking the non-parabolicity of the conduction band of InSb into account.
社団法人日本物理学会の論文
1973-10-05