Magnetic field dependence of hot-electron transport in GaAs.

We have studied the magnetic field dependence of hot-electron spectra using hot-electron spectroscopy. It is shown that application of a magnetic field normal to the injection direction has a dramatic effect on the spectra whereas a magnetic field applied parallel to the injection direction has no effect. The magnetic field is shown to increase the effective transit region width of the spectrometer enabling us to deduce a scattering rate for hot electrons that is at least four times greater than would be expected considering phonon emission alone. [ABSTRACT FROM AUTHOR]