title: Electron transport through a molecular conductor with center-of-mass motion.
abstract: The linear conductance of a molecular conductor oscillating between two metallic leads is investigated numerically both for Hubbard interacting and noninteracting electrons. The molecule-leads tunneling barriers depend on the molecule displacement from its equilibrium position. The results present an interesting interference which leads to a conductance dip at the electron-hole symmetry point that could be experimentally observable. It is shown that this dip is caused by the destructive interference between the purely electronic and phonon-assisted tunneling channels, which are found to carry opposite phases. When an internal vibrational mode is also active, the electron-hole symmetry is broken but a Fano-like interference is still observed.
authors.affiliation: Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: Al-Hassanieh
authors.forename: C A
authors.initials: CA
authors.lastname: Büsser
authors.forename: G B
authors.initials: GB
authors.lastname: Martins
authors.forename: E
authors.initials: E
authors.lastname: Dagotto