Abstract
Nonlinear transport properties of hot electrons in n-type InSb in strong magnetic fields have been investigated experimentally and theoretically. Current-voltage characteristics have been observed in both longitudinal and transverse magnetic fields at liquid helium temperatures. The nonlinear characteristics have been calculated with the method of Kurosawa which treats the motion of electrons in an electric field as the flow of particles in an energy space. The calculations closely approximate the experimental results, where proper scattering mechanisms are assumed. Anomalous microwave photoconductivities have been observed as a function of d.c. electric current in both longitudinal and transverse magnetic fields. The observed signals were composed of several series of maxima and could not be explained only by Kogan's theory based on the electron-temperature approximation. The results were discussed with the distortion of the distribution function of hot electrons occupying several Landau subbands.
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