title: Quantum interference effects at room temperature in OPV-based single-molecule junctions.
abstract: Interference effects on charge transport through an individual molecule can lead to a notable modulation and suppression on its conductance. In this letter, we report the observation of quantum interference effects occurring at room temperature in single-molecule junctions based on oligo(3)-phenylenevinylene (OPV3) derivatives, in which the central benzene ring is coupled to either para- or meta-positions. Using the break-junction technique, we find that the conductance for a single meta-OPV3 molecule wired between gold electrodes is one order of magnitude smaller than that of a para-OPV3 molecule. Theoretical calculations confirm the occurrence of constructive and destructive interference in the para- and meta-OPV3 molecules respectively, which arises from the phase difference of the transmission coefficients through the molecular orbitals.
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, Delft, 2628 CJ, The Netherlands. c.arroyorodriguez@tudelft.nl.
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Arroyo
authors.forename: Riccardo
authors.initials: R
authors.lastname: Frisenda
authors.forename: Kasper
authors.initials: K
authors.lastname: Moth-Poulsen
authors.forename: Johannes S
authors.initials: JS
authors.lastname: Seldenthuis
authors.forename: Thomas
authors.initials: T
authors.lastname: Bjørnholm
authors.forename: Herre Sj
authors.initials: HS
authors.lastname: van der Zant