Condensed Matter Theory   Universität Basel
Dr. Jörg Lehmann

Controlling currents through molecular wires

S. Kohler, J. Lehmann, and P. Hänggi

Superlatt. Microstruct. 34, 419 (2004)

We investigate the possibility of controlling by external laser fields both the current through molecular wires and the corresponding noise properties. It is found that a proper off-resonant driving field reduces the coherent transport across the molecule resulting in a strong current suppression. The relative level of transport noise, being characterized by a Fano factor, exhibits characteristic maxima and minima near regimes of current suppression. In a three-terminal configuration, the field allows to steer the current selectively towards one terminal.

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Uni Basel » Department of Physics » Condensed Matter Theory
last updated on 2008/03/19