Influence of Correlated Hybridization on the Conductance of Molecular Transistors

Abstract

We study the spin-1/2 single-channel Anderson impurity model with correlated (occupancy dependent) hybridization for molecular transistors using the numerical renormalization-group method. Correlated hybridization can induce nonuniversal deviations in the normalized zero-bias conductance and, for some parameters, modestly enhance the spin polarization of currents in applied magnetic field. Correlated hybridization can also explain a gate-voltage dependence to the Kondo scale similar to what has been observed in recent experiments.

4 pages, 5 figures

References in corpus (2)

• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• Assisted hopping and interaction effects in impurity models