title: Many-body effects on the transport properties of single-molecule devices.
abstract: The conductance through a molecular device including electron-electron and electron-phonon interactions is calculated using the numerical renormalization group method. At low temperatures and weak electron-phonon coupling the properties of the conductance can be explained in terms of the standard Kondo model with renormalized parameters. At large electron-phonon coupling a charge analog of the Kondo effect takes place that can be mapped into an anisotropic Kondo model. In this regime the molecule is strongly polarized by a gate voltage which leads to rectification in the current-voltage characteristics of the molecular junction.
authors.affiliation: CEA-Saclay, DSM/DRECAM/SPCSI, Gif sur Yvette, France.
authors.forename: P S
authors.initials: PS
authors.lastname: Cornaglia
authors.forename: H
authors.initials: H
authors.lastname: Ness
authors.forename: D R
authors.initials: DR
authors.lastname: Grempel