Non-linear transport through a molecular nanojunction
Forschungszentrum Karlsruhe, Institut für Nanotechnologie
Postfach 3640, D-76021 Karlsruhe, Germany
2 RWTH Aachen, Theoretische Physik A - D-52056 Aachen, Germany
Accepted: 29 November 2001
We present a simple model of electrical transport through a metal-molecule-metal nanojunction that includes charging effects as well as aspects of the electronic structure of the molecule. The interplay of a large charging energy and an asymmetry of the metal-molecule coupling can lead to various effects in non-linear electrical transport. In particular, strong negative differential conductance is observed under certain conditions.
PACS: 73.63.-b – Electronic transport in mesoscopic or nanoscale materials and structures / 73.23.Hk – Coulomb blockade; single-electron tunneling / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nano tubes, and nanocrystals
© EDP Sciences, 2002