Electron-Phonon Correlation Effects in Molecular Transistors

Abstract

The interplay of electron-electron and electron-phonon interactions is studied analytically in the Kondo regime. A Holstein electron-phonon coupling is shown to produce a weakening of the gate voltage dependence of the Kondo temperature and may explain the observed anomalies in some of these devices. A molecular center-of-mass mode opens a new channel for charge and spin fluctuations and in the antiadabatic limit the latter are described by an asymmetric two-channel Kondo model. Below the Kondo temperature the system develops a dynamical Jahn-Teller distortion and a low energy peak emerges in the phonon spectral density that could be observed in Raman microscopy experiments.

6 pages, 4 figures

References in corpus (9)

• Franck-Condon blockade and giant Fano factors in transport through single molecules
• The Kondo effect in C${}_{60}$ single-molecule transistors
• Vibrational sidebands and dissipative tunneling in molecular transistors
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• Vibrational Sidebands and Kondo-effect in Molecular Transistors
• Quantum transport through a deformable molecular transistor
• Magnetoconductance through a vibrating molecule in the Kondo regime
• Endohedral Impurities in Carbon Nanotubes

Cited by in corpus (8)

• Vibration-induced correction to the current through a single molecule
• Electronic Transport through Magnetic Molecules with Soft Vibrating Modes
• Interpolative approach for electron-electron and electron-phonon interactions: from the Kondo to the polaronic regime
• Phonon-assisted tunneling and two-channel Kondo physics in molecular junctions
• Kondo effect and channel mixing in oscillating molecules
• Slave boson theory for transport through magnetic molecules with vibronic states
• Vibrational effects on low-temperature properties of molecular conductors
• Temperature effect in the conductance of hydrogen molecule