Molecular conduction: paradigms and possibilities

Details Molecular conduction: paradigms and possibilities Molecular conduction: paradigms and possibilities

2003-03-31

arxiv.org/abs/cond-mat/0303630v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

2002 International Conference on Computational Nanoscience and Nanotechnology, San Juan, Puerto Rico. Modified version appeari

Scientific paper

We discuss the factors that determine the overall shape and magnitude of the current-voltage (I-V) characteristics of a variety of molecular conductors sandwiched between two metallic contacts. We analyze the individual influences of the contact geometry, the molecular chemistry, the electrostatics of the environment, and charging on molecular conduction. Current conduction depends sensitively on the experimental geometry, as well as on the theoretical model for the molecule and the contacts. Computing molecular I-V characteristics will thus require theoretical understanding on several fronts, in particular, (a) in the scheme for calculating the molecular energy levels, as well as (b) on the position of the contact Fermi energy relative to those levels.

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