Vibrationally dependent electron-electron interactions in resonant electron transport through single-molecule junctions

Abstract

We investigate the role of electronic-vibrational coupling in resonant electron transport through single-molecule junctions, taking into account that the corresponding coupling strengths may depend on the charge and excitation state of the molecular bridge. In the presence of multiple electronic states, this requires to extend the commonly used model and include vibrationally dependent electron-electron interaction. We use Born-Markov master equation methods and consider selected models to exemplify the effect of the additional interaction on the transport characteristics of a single-molecule junction. In particular, we show that it has a significant influence on local cooling and heating mechanisms, may result in negative differential resistance, and cause pronounced asymmetries in the conductance map of a single-molecule junction.

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Cited by in corpus (10)

• Hierarchical quantum master equation approach to electronic-vibrational coupling in nonequilibrium transport through nanosystems: Reservoir formulation and application to vibrational instabilities
• Current-induced bond rupture in single-molecule junctions
• Extending the hierarchical quantum master equation approach to low temperatures and realistic band structures
• Revealing strong correlations in higher order transport statistics: a noncrossing approximation approach
• Current-induced dissociation in molecular junctions beyond the paradigm of vibrational heating: The role of anti-bonding electronic states
• Unraveling current-induced dissociation mechanisms in single-molecule junctions
• AC transport and full-counting statistics of molecular junctions in the weak electron-vibration coupling regime
• Emergence of negative viscosities and colored noise under current-driven Ehrenfest molecular dynamics
• Hierarchical quantum master equation approach to charge transport in molecular junctions with time-dependent molecule-lead coupling strengths
• Quantum turnstile regime of nanoelectromechanical systems