Abstract
Abstract We have applied wave packet formalism to investigate the dynamics of electron transport in semiconductor nanodevices shaped in branched nanowires. The nanowires are formed by quantum channels with a width of 10 nm, in which a two-dimensional electron gas is scattered. The theoretical model is based on the numerical solution of the time-dependent Schrodinger equation, within the effective-mass and envelope wave function formalism. The split-operator technique is applied and it allows us to calculate the transmission probability, the total probability current, the conductance, and the wave function scattering between the energy subbands. Moreover, the transmission can be tuned in the output channels by applying an external electric field. Hence, the conductivity in the output device can be controlled by an external parameter. We also show how the geometry of the nanowires acts to scatter the electron gas and how the conductance is affected.
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