Abstract
An analytical expression is obtained for the I-V curves for a tight-binding model of a molecule-metal junction for off-resonance injection. The derivation takes into account a self-consistent determination of the voltage that leads to a spatial pattern where the voltage drop occurs at the molecule-wire interface. The relevance of this model for electron transfer reactions and molecular conductance is assessed. It leads to a striking power law dependence of the current on the voltage, while preserving the exponential length dependence of either the conductance or the reaction rate.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 365-370 |
| Number of pages | 6 |
| Journal | Chemical Physics |
| Volume | 264 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1 2001 |
Funding
We thank the chemistry divisions of the NSF, the ONR and the DoD/MURI program for partial support. We also thank A. Nitzan, N. Rampi and A. Burin for helpful discussions. Collaboration between Caracas and Evanston is supported by NSF-Conicit Proyecto de Grupo G-97000741.
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry