Coulomb blockade effects in driven electron transport
arXiv:cond-mat/0606457 · doi:10.1140/epjb/e2006-00439-7
Abstract
We study numerically the influence of strong Coulomb repulsion on the current through molecular wires that are driven by external electromagnetic fields. The molecule is described by a tight-binding model whose first and last site is coupled to a respective lead. The leads are eliminated within a perturbation theory yielding a master equation for the wire. The decomposition into a Floquet basis enables an efficient treatment of the driving field. For the electronic excitations in bridged molecular wires, we find that strong Coulomb repulsion significantly sharpens resonance peaks which broaden again with increasing temperature. By contrast, Coulomb blockade has only a small influence on effects like non-adiabatic electron pumping and coherent current suppression.
9 pages, 7 figures. Added a plot for temperature dependence of resonance peaks. Published version
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- Shot noise in non-adiabatically driven nanoscale conductors
- Transient Charging and Discharging of Spin-polarized Electrons in a Quantum Dot
- Quantum noise in ac-driven resonant-tunneling double barrier structures: Photon-assisted tunneling vs. electron anti-bunching
- Molecular electronics in junctions with energy disorder
- Current without bias and diode effect in shuttling transport of nanoshafts
- Statistics of resonance and non-resonance tunnelling of fermionised cold atoms