Effects of coupling to vibrational modes on the ac conductance of molecular junctions

Abstract

We theoretically examine the effect of the coupling of the transport electrons to a vibrational mode of the molecule on the ac linear-response conductance of molecular junctions. Representing the molecule by a single electronic state, we find that at very low temperatures the frequency-dependent conductance is mainly enhanced (suppressed) by the electron-vibration interaction when the chemical potential is below (above) the energy of that state. The vertex corrections of the electron-vibration interaction induce an additional peak structure in the conductance, which can be observed by tuning the tunnel couplings with the leads.

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Cited by in corpus (6)

• Full-counting statistics for molecular junctions: Fluctuation theorem and singularities
• Non-equilibrium inelastic electronic transport: Polarization effects and vertex corrections to the self-consistent Born approximation
• AC transport and full-counting statistics of molecular junctions in the weak electron-vibration coupling regime
• Quantum transport in driven systems with vibrations: Floquet nonequilibrium Green's functions and the GD approximation
• Transient currents of a single molecular junction with a vibrational mode
• Phonon effects on the current noise spectra and the ac conductance of a single molecular junction