Abstract
The influence of intersubband and intervalley scattering onto the drift velocity of hot 2D electrons in n-GaAs quantum wells and heterostructures is investigated numerically for the first time by means of the Boltzmann integral equation method. The dependence of the subband energy separation onto the drift velocity is analyzed systematically. The drift velocity in quantum wells having a thickness larger than 100 Å is found to be significantly reduced by intersubband transitions if the external electric field exceeds 1 kV/cm.
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