Electron transport through a metal-molecule-metal junction

Details Electron transport through a metal-molecule-metal junction Electron transport through a metal-molecule-metal junction

1999-04-02

arxiv.org/abs/cond-mat/9904037v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 12 figures to appear in Phys. Rev. B 59(19) 1999

Scientific paper

10.1103/PhysRevB.59.12505

Molecules of bisthiolterthiophene have been adsorbed on the two facing gold electrodes of a mechanically controllable break junction in order to form metal-molecule(s)-metal junctions. Current-voltage (I-V) characteristics have been recorded at room temperature. Zero bias conductances were measured in the 10-100 nS range and different kinds of non-linear I-V curves with step-like features were reproducibly obtained. Switching between different kinds of I-V curves could be induced by varying the distance between the two metallic electrodes. The experimental results are discussed within the framework of tunneling transport models explicitly taking into account the discrete nature of the electronic spectrum of the molecule.

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