title: Electronic transport in fullerene C20 bridge assisted by molecular vibrations.
abstract: The effect of molecular vibrations on electronic transport is investigated with the smallest fullerene C20 bridge, utilizing the Keldysh nonequilibrium Green's function techniques combined with the tight-binding molecular-dynamics method. Large discontinuous steps appear in the differential conductance when the applied bias voltage matches particular vibrational energies. The magnitude of the step is found to vary considerably with the vibrational mode and to depend on the local electronic states besides the strength of electron-vibration coupling. On the basis of this finding, a novel way to control the molecular motion by adjusting the gate voltage is proposed.
authors.affiliation: Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Watanabe
authors.forename: Satoshi
authors.initials: S
authors.lastname: Watanabe