期刊
PHYSICAL REVIEW B
卷 85, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.121408
关键词
-
资金
- DFG [SPP 1243, SFB 668]
- ZIM (Dusseldorf)
We formulate and apply a nonperturbative numerical approach to the nonequilibrium current I(V) through a voltage-biased molecular conductor. We focus on a single electronic level coupled to an unequilibrated vibration mode (Anderson-Holstein model), which can be mapped to an effective three-state problem. Performing an iterative summation of real-time path integral (ISPI) expressions, we accurately reproduce known analytical results in three different limits. We then study the crossover regime between those limits and show that the Franck-Condon blockade persists in the quantum-coherent low-temperature limit, with a nonequilibrium smearing of step features in the IV curve.
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