6533b7d8fe1ef96bd126a3ea

RESEARCH PRODUCT

Transverse velocity fluctuations of hot electrons in n-type GaAs in crossed electric and magnetic fields by Monte Carlo methods

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In this work we investigate some steady‐state stochastic properties of hot electron dynamics in bulk n‐type GaAs in the presence of crossed, static electric and magnetic fields. To this aim, a single particle, three valleys‐Monte Carlo method is adopted. In order to include the non‐parabolicity of valleys a local parabolic approximation is performed allowing us to get an analytic expression for k(t) during free flights. It is shown how the room temperature‐spectrum of longitudinal velocity fluctuations is markedly affected by the oscillations at the cyclotron frequency and is lowered or increased by the magnetic field depending on the considered frequency. On the contrary, the transverse spectral density turns out to be reduced in a suitable range of electric field strengths, as a consequence of the lowering of transverse velocity fluctuations’s variance. We found that in the same electric field range the mean kinetic energy is lowered too.