The influence of vibronic coupling on the shape of transport characteristics in inelastic tunneling through molecules
arXiv:cond-mat/0510802 · doi:10.1016/j.physe.2005.11.016
Abstract
Here we present theoretical studies of the effect of vibronic coupling on nonlinear transport characteristics (current-voltage and conductance-voltage) in molecular electronic devices. Considered device is composed of molecular quantum dot (with discrete energy levels) weakly connected to metallic electrodes (treated within the wide-band approximation), where molecular vibrations are modeled as dispersionless phonon excitations. Nonperturbative computational scheme, used in this work, is based on the Green's function theory within the framework of mapping technique (GFT-MT) which transforms the many-body electron-phonon interaction problem into a one-body multi-channel single-electron scattering problem. In particular, it is shown that quantum coherent transport of virtual polarons through the molecule can be a dominant factor justifying some well-known discrepancies between theoretical calculations and experimental results.
10 pages, 4 figures
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Cited by in corpus (5)
- Thermoelectric properties of vibrating molecule asymmetrically connected to the electrodes
- Identification of the Atomic Scale Structures of the Gold-Thiol Interfaces of Molecular Nanowires by Inelastic Tunneling Spectroscopy
- Vibrational features in inelastic electron tunneling spectra
- Inelastic Tunneling Spectroscopy of Gold-Thiol and Gold-Thiolate Interfaces in Molecular Junctions: The Role of Hydrogen
- Decoherence in elastic and polaronic transport via discrete quantum states