期刊
JOURNAL OF CHEMICAL PHYSICS
卷 142, 期 16, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4918771
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资金
- Hong Kong Research Grant Council [HKU 7009/12P, 7007/11P, 700913P]
- University Grant Council [AoE/P-04/08]
- National Natural Science Foundation of China [NSFC 21322306, NSFC 21273186]
- National Basic Research Program of China [2014CB921402]
A time-dependent inelastic electron transport theory for strong electron-phonon interaction is established via the equations of motion method combined with the small polaron transformation. In this work, the dissipation via electron-phonon coupling is taken into account in the strong coupling regime, which validates the small polaron transformation. The corresponding equations of motion are developed, which are used to study the quantum interference effect and phonon-induced decoherence dynamics in molecular junctions. Numerical studies show clearly quantum interference effect of the transport electrons through two quasi-degenerate states with different couplings to the leads. We also found that the quantum interference can be suppressed by the electron-phonon interaction where the phase coherence is destroyed by phonon scattering. This indicates the importance of electron-phonon interaction in systems with prominent quantum interference effect. (C) 2015 AIP Publishing LLC.
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