Coulomb blockade effects in driven electron transport

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

References in corpus (8)

• Driven quantum transport on the nanoscale
• The influence of ultra-fast laser pulses on electron transfer in molecular wires studied by a non-Markovian density matrix approach
• Vibrational effects in laser driven molecular wires
• Rectification of laser-induced electronic transport through molecules
• Nonadiabatic Electron Pumping: Maximal Current with Minimal Noise
• Switching the current through molecular wires
• Charge transport through a molecule driven by a high-frequency field
• Coherent charge transport through molecular wires: influence of strong Coulomb repulsion

Cited by in corpus (3)

• Modeling elastic and photoassisted transport in organic molecular wires: length dependence and current-voltage characteristics
• Molecular electronics in junctions with energy disorder
• Current without bias and diode effect in shuttling transport of nanoshafts