2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23580The 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.4 pages, 4 figures, minor changes, added referencesStrongly Correlated ElectronsMesoscale and Nanoscale Physicstext