Orientational dependence of current through molecular films

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  • 16 February 2001
Abstract
We study the current through molecular films as a function of orientation of the molecules in the film with respect to electrodes. It changes by more than an order of magnitude, depending on the angle between the axis of the molecules and the normal to the electrode. This is a consequence of strong directional character of $p$-orbitals that determines the conductance through the molecules. We demonstrate this general result on exactly solvable model, and present the calculations for two different experimentally studied molecular films sandwiched between gold electrodes.

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