Effect of dephasing on electron transport in a molecular wire: Green’s function approach

The effect of dephasing on electron transport through a benzene molecule is carefully examined using a phenomenological model introduced by Büttiker. Within a tight-binding framework all the calculations are performed based on the Green’s function formalism. We investigate the influence of dephasing on transmission probability and current–voltage characteristics for three different configurations (ortho, meta and para) of the molecular system depending on the locations of two contacting leads. The presence of dephasing provides a significant change in the spectral properties of the molecule and exhibits several interesting patterns that have so far remain unexplored.

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► Effect of dephasing on electron transport in a benzene molecule.
► Dephasing is introduced through Buttiker probe model.
► Transmittance-energy and current-voltage spectra are studied for ortho, meta and para positions.
► Vibronic effects are neglected.