Magnetoconductance through a vibrating molecule in the Kondo regime

Abstract

The effect of a magnetic field on the equilibrium spectral and transport properties of a single-molecule junction is studied using the numerical renormalization group method. The molecule is described by the Anderson-Holstein model in which a single vibrational mode is coupled to the electron density. The effect of an applied magnetic field on the conductance in the Kondo regime is qualitatively different in the weak and strong electron-phonon coupling regimes. In the former case, the Kondo resonance is split and the conductance is strongly suppressed by a magnetic field $gm{u}_{B}B\gtrsim k_B{T}_K$, with $T_K$ the Kondo temperature. In the strong electron-phonon coupling regime a charge analog of the Kondo effect develops. In this case the Kondo resonance is not split by the field and the conductance in the Kondo regime is enhanced in a broad range of values of $B$.

6 pages, 4 figures

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Cited by in corpus (19)

• The numerical renormalization group method for quantum impurity systems
• Molecular Transport Junctions: Vibrational Effects
• Resonant inelastic tunneling in molecular junctions
• Kinetic Equations for Transport Through Single-Molecule Transistors
• Pair tunneling through single molecules
• Pair-tunneling resonance in the single-electron transport regime
• Kondo effect with non collinear polarized leads: a numerical renormalization group analysis
• Enhanced Kondo Effect in an Electron System Dynamically Coupled with Local Optical Phonon
• Phonon-assisted Kondo Effect in a Single-Molecule Transistor out of Equilibrium
• Transport through quantum dots: A combined DMRG and cluster-embedding study
• Electron-Phonon Correlation Effects in Molecular Transistors
• Spin-charge separation and simultaneous spin and charge Kondo effect
• Kondo effect in quantum dots coupled to ferromagnetic leads with noncollinear magnetizations: effects due to electron-phonon coupling
• Conductance of a molecule with a center of mass motion
• Pair Tunneling and shot noise through a single molecule in a strong electron-phonon coupling
• Vibrational detection and control of spin in mixed-valence molecular transistors
• Dynamical magnetic anisotropy and quantum phase transitions in a vibrating spin-1 molecular junction
• Slave boson theory for transport through magnetic molecules with vibronic states
• Electromechanical instability in vibrating quantum dots with effectively negative charging energy