Quantum interference effects at room temperature in OPV-based single-molecule junctions

Arroyo, C.R.Technische Universiteit Delft,Delft University of Technology (TU Delft) (författare)

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.

Frisenda, R.Technische Universiteit Delft,Delft University of Technology (TU Delft) (författare)
Moth-Poulsen, Kasper,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mkasper (författare)
Seldenthuis, J.S.Technische Universiteit Delft,Delft University of Technology (TU Delft) (författare)
Bjornholm, T.Köpenhamns universitet,University of Copenhagen (författare)
van der Zant, HerreTechnische Universiteit Delft,Delft University of Technology (TU Delft) (författare)
Technische Universiteit DelftChalmers tekniska högskola (creator_code:org_t)

Av författaren/redakt...: Arroyo, C.R.; Frisenda, R.; Moth-Poulsen, Ka ...; Seldenthuis, J.S ...; Bjornholm, T.; van der Zant, He ...

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