期刊
PHYSICAL REVIEW B
卷 87, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.085422
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资金
- German-Israeli Foundation for Scientific Development (GIF)
- Deutsche Forschungsgemeinschaft (DFG) through the DFG-Cluster of Excellence 'Engineering of Advanced Materials'
- SFB 953
- Alexander von Humboldt Foundation
We investigate the interplay of quantum interference effects and electronic-vibrational coupling in electron transport through single-molecule junctions, employing a nonequilibrium Green's function approach. Our findings show that inelastic processes lead, in general, to a quenching of quantum interference effects. This quenching is more pronounced for increasing bias voltages and levels of vibrational excitation. As a result of this vibrationally induced decoherence, vibrational signatures in the transport characteristics of a molecular contact may strongly deviate from a simple Franck-Condon picture. This includes signatures in both the resonant and the nonresonant transport regimes. Moreover, it is shown that local cooling by electron-hole pair creation processes can influence the transport characteristics profoundly, giving rise to a significant temperature dependence of the electrical current. DOI: 10.1103/PhysRevB.87.085422
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