Effects of relative orientation of the molecules on electron transport in molecular devices

Details Effects of relative orientation of the molecules on electron transport in molecular devices Effects of relative orientation of the molecules on electron transport in molecular devices

2006-10-31

arxiv.org/abs/cond-mat/0610871v1

Chinese Physics letters 23,2609 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1088/0256-307X/23/9/072

Effects of relative orientation of the molecules on electron transport in molecular devices are studied by non-equilibrium Green's function method based on density functional theory. In particular, two molecular devices, with the planer Au$_{7}$ and Ag$_{3}$ clusters sandwiched between the Al(100) electrodes are studied. In each device, two typical configurations with the clusters parallel and vertical to the electrodes are considered. It is found that the relative orientation affects the transport properties of these two devices completely differently. In the Al(100)-Au$_7$-Al(100) device, the conductance and the current of the parallel configuration are much larger than those in the vertical configuration, while in the Al(100)-Ag$_{3}$-Al(100) device, an opposite conclusion is obtained.

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