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

References in corpus (5)

• The Kondo effect in C${}_{60}$ single-molecule transistors
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Vibrational sidebands and dissipative tunneling in molecular transistors
• Many Body Effects on the Transport Properties of Single-Molecule Devices
• Quantum transport through a deformable molecular transistor