title: Single-molecule electric revolving door.
abstract: This work proposes a new type of molecular machine, the single-molecule electric revolving door, which utilizes conductance dependence upon molecular conformation as well as destructive quantum interference. We perform electron transport simulations in the zero-bias limit using the Landauer formalism together with density functional theory. The simulations show that the open- and closed-door states, accompanied by significant conductance variation, can be operated by an external electric field. The large on-off conductance ratio (~10(5)) implies that the molecular machine can also serve as an effective switching device. The simultaneous control and detection of the door states can function at the nanosecond scale, thereby offering a new capability for molecular-scale devices.
authors.affiliation: Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States.
authors.forename: Liang-Yan
authors.initials: LY
authors.lastname: Hsu
authors.forename: Elise Y
authors.initials: EY
authors.lastname: Li
authors.forename: Herschel
authors.initials: H
authors.lastname: Rabitz