Inelastic effects in molecular junctions in the Coulomb and Kondo regimes: Nonequilibrium equation-of-motion approach

Abstract

Inelastic effects in the Coulomb blockade and Kondo regimes of electron transport through molecular junctions are considered within a simple nonequilibrium equation-of-motion (EOM) approach. The scheme is self-consistent, and can qualitatively reproduce the main experimental observations of vibrational features in Coulomb blockade [H.Park et al., Nature 407, 57 (2000)] and Kondo [L.H.Yu et al., Phys. Rev. Lett. 93, 266802 (2004)] regimes. Considerations similar to the equilibrium EOM approach by Meir et al. [Phys. Rev. Lett. 66, 3048 (1991); ibid. 70, 2601 (1993)] are used on the Keldysh contour to account for the nonequilibrium nature of the junction, and dressing by appropriate Franck-Condon (FC) factors is used to account for vibrational features. Results of the equilibrium EOM scheme by Meir et al. are reproduced in the appropriate limit.

12 pages, 5 figures

References in corpus (8)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Nonequilibrium Transport through a Kondo Dot in a Magnetic Field: Perturbation Theory
• Quantum transport through a deformable molecular transistor
• Effect of Electron Correlation on Current and Current Noise for the Single- and Two-Impurity Anderson Model

Cited by in corpus (2)

• Nonequilibrium isolated molecule limit
• The electron transport through a quantum dot in the Coulomb blockade regime: Non-equilibrium Green's functions based model