Quantum Interference and Decoherence in Single-Molecule Junctions: How Vibrations Induce Electrical Current

Abstract

Quantum interference effects and decoherence mechanisms in single-molecule junctions are analyzed employing a nonequilibrium Green's function approach. Electrons tunneling through quasi-degenerate states of a nanoscale molecular junction exhibit interference effects. We show that electronic-vibrational coupling, inherent to any molecular junction, strongly quenches such interference effects. As a result, the electrical current can be significantly larger than without electronic-vibrational coupling. The analysis reveals that the quenching of quantum interference is particularly pronounced if the junction is vibrationally highly excited, e.g. due to current-induced nonequilibrium effects in the resonant transport regime.

11 pages, 4 figures

References in corpus (16)

• Molecular Transport Junctions: Vibrational Effects
• Phonon effects in molecular transistors: Quantum and classical treatment
• Coherent coupling of two quantum dots embedded in an Aharonov-Bohm ring
• Resonant inelastic tunneling in molecular junctions
• Flux-Dependent Level Attraction in Double-Dot Aharonov-Bohm Interferometers
• Tunneling broadening of vibrational sidebands in molecular transistors
• Resonant Electron Transport in Single-Molecule Junctions: Vibrational Excitation, Rectification, Negative Differential Resistance and Local Cooling
• A benzene interference single-electron transistor
• Vibrational effects in laser driven molecular wires
• Vibrational nonequilibrium effects in the conductance of single-molecules with multiple electronic states
• Multimode vibrational effects in single molecule conductance: A nonequilibrium Green's function approach
• Vibrational absorption sidebands in the Coulomb blockade regime of single-molecule transistors
• Mode-selective vibrational excitation induced by nonequilibrium transport processes in single-molecule junctions
• Transport signature of pseudo-Jahn-Teller dynamics in a single-molecule transistor
• Quantum transport through single-molecule junctions with orbital degeneracies
• Phonon Spectroscopy by Electric Measurements of Coupled Quantum Dots

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