期刊
JOURNAL OF CHEMICAL PHYSICS
卷 131, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3231604
关键词
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资金
- NSF [DMR-PREM 0353730]
- DoD [W911NF-06-1-0519]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0934195] Funding Source: National Science Foundation
We theoretically analyzed inelastic effects in the electron transport through molecular junctions originating from electron-vibron interactions. The molecular bridge was simulated by a periodical chain of identical hydrogenlike atoms with the nearest neighbors interaction thus providing a set of energy states for the electron tunneling. To avoid difficulties inevitably arising when advanced computational techniques are employed to study inelastic electron transport through multilevel bridges, we propose and develop a semiphenomenological approach. The latter is based on Buttiker's dephasing model within the scattering matrix formalism. We apply the proposed approach to describe features associated with electron energy transfer to vibrational phonons that appear in the second derivative of the current in the junction with respect to the bias voltage. In the particular case of a single level bridge our results agree with those obtained by proper calculations carried out within the nonequilibrium Green's functions method indicating the usefulness of the suggested approach. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3231604]
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