Nonequilibrium transport in molecular junctions with strong electron-phonon interactions

Abstract

We present a combined theoretical approach to study the nonequilibrium transport properties of nanoscale systems coupled to metallic electrodes and exhibiting strong electron-phonon interactions. We use the Keldysh Green function formalism to generalize beyond linear theory in the applied voltage an equation of motion method and an interpolative self-energy approximation previously developed in equilibrium. We analyze the specific characteristics of inelastic transport appearing in the intensity versus voltage curves and in the conductance, providing qualitative criteria for the sign of the step-like features in the conductance. Excellent overall agreement between both approaches is found for a wide range of parameters.

24 pages, 6 figures

References in corpus (17)

• Molecular Transport Junctions: Vibrational Effects
• Phonon effects in molecular transistors: Quantum and classical treatment
• Inelastic electron tunneling spectroscopy in molecular junctions: Peaks and dips
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Vibrational sidebands and dissipative tunneling in molecular transistors
• Inelastic scattering and local heating in atomic gold wires
• Resonant inelastic tunneling in molecular junctions
• Modeling inelastic phonon scattering in atomic- and molecular-wire junctions
• Stretching dependence of the vibration modes of a single-molecule Pt-H2-Pt bridge
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Universal features of electron-phonon interactions in atomic wires
• Vibration-induced correction to the current through a single molecule
• Inelastic effects in molecular junctions in the Coulomb and Kondo regimes: Nonequilibrium equation-of-motion approach
• From tunneling to contact: Inelastic signals in an atomic gold junction
• Electronic Transport in Fullerene C20 Bridge Assisted by Molecular Vibrations
• Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach
• Interpolative approach for electron-electron and electron-phonon interactions: from the Kondo to the polaronic regime

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• Nonequilibrium transport through magnetic vibrating molecules
• Dressed tunneling approximation for electronic transport through molecular transistors
• Extension of the Nakajima-Zwanzig approach to multitime correlation functions of open systems
• Nonequilibrium conductance through a benzene molecule in the Kondo regime
• Full counting statistics of phonon-assisted Andreev tunneling through a quantum dot coupled to normal and superconducting leads
• Transient dynamics and steady state behavior of the Anderson-Holstein model with a superconducting lead
• Local density of states on a vibrational quantum dot out of equilibrium
• Effects of electron-phonon coupling in the Kondo regime of a two-orbital molecule
• Electronic transport through molecular transistors in the polaronic regime
• Adiabatic Green's function technique and the transient behavior in time-dependent fermion-boson coupled models