کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5373268 | 1504213 | 2015 | 6 صفحه PDF | دانلود رایگان |
- Current-voltage characteristics of two polymeric junctions are studied.
- Current is reduced in phonon assistant tunneling regime.
- Behavior of current is independent of temperature.
- 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.
Journal: Chemical Physics - Volume 452, 1 May 2015, Pages 61-66