| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5373268 | Chemical Physics | 2015 | 6 Pages |
â¢Current-voltage characteristics of two polymeric junctions are studied.â¢Current is reduced in phonon assistant tunneling regime.â¢Behavior of current is independent of temperature.â¢Elastic energy changes current drastically.
The inelastic electron transport properties through two polymeric (trans-polyacetylene and polythiophene) molecular junctions are studied using Keldysh nonequilibrium Green function formalism. The Hamiltonian of the polymers is described via Su-Schrieffer-Heeger model and the metallic electrodes are modeled by the wide-band approximation. Results show that the step-like behavior of the current-voltage characteristics is deformed in presence of strong electron-phonon interaction. Also, the magnitude of current is slightly decreased in the phonon assistant electron transport regime. In addition, it is observed that the I-V curves are independent of temperature.
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