title: Vibrationally induced two-level systems in single-molecule junctions.
abstract: Single-molecule junctions are found to show anomalous spikes in dI/dV spectra. The position in energy of the spikes is related to local vibration mode energies. A model of vibrationally induced two-level systems reproduces the data very well. This mechanism is expected to be quite general for single-molecule junctions. It acts as an intrinsic amplification mechanism for local vibration mode features and may be exploited as a new spectroscopic tool.
authors.affiliation: Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands.
authors.forename: W H A
authors.initials: WH
authors.lastname: Thijssen
authors.forename: D
authors.initials: D
authors.lastname: Djukic
authors.forename: A F
authors.initials: AF
authors.lastname: Otte
authors.forename: R H
authors.initials: RH
authors.lastname: Bremmer
authors.forename: J M
authors.initials: JM
authors.lastname: van Ruitenbeek