Abstract
We investigate the transient and steady-state electron transport properties in bulk wurtzite InN using the ensemble Monte Carlo method. The main emphasis is given to the origin of the negative differential mobility of the steady-state velocity-field characteristics and of the strong transient velocity overshoot. In general, these effects can be caused by intervalley transfer and by the nonparabolicity of the main valley of the conduction band. We analyze the relative importance of these two mechanisms and demonstrate that in wurtzite InN the negative differential mobility and drift velocity overshoot are governed by the strong nonparabolicity of the central valley.
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