Аннотация
We study on the electron transport of an ensemble of coupled sites that
simulates an array of quantum dots or a molecular system. By using the
Green's function technique, we calculate current and shot noise for
linear and disordered site arrays. While in the linear case the
characteristic I-V curve reveals no current rectification, in the
disordered configurations a robust rectification is found, thus
indicating an operational regime typical of molecular diodes.
Additionally, a negative differential resistance is observed due to the
drop of the bias voltage along the structure, which yields to an energy
mismatch of neighboring sites. Finally, the Fano factor reveals a
stronger transport correlation for positive than for negative bias
voltages in the disordered site configuration.
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