Length dependence of the electronic transparence (conductance) of a molecular wire
CEMES-LOE/CNRS 29, Rue J. Marvig - B.P. 4347, 31055
Toulouse Cedex, France
Accepted: 22 January 1996
The electronic transparence of a single molecular wire connecting the two electrodes of a metal-insulating-metal nanojunction decreases exponentially with its length. The transparence attenuation can be quite small depending of the homo-lumo gap of the molecule and of electronic interaction of the wire ends with the electrodes. For a 10 nm long polyene connecting two nano-electrodes, a 100 mV bias voltage will lead to a tunnelling current intensity in the 10 pA range.
PACS: 73.40.Sx – Metal-semiconductor-metal structures / 73.40.Gk – Tunneling / 73.90.+f – Other topics in electronic structure and electrical properties of surfaces, interfaces, and thin films
© EDP Sciences, 1996