Quantum interference effects at room temperature in OPV-based single-molecule junctions
Artikel i vetenskaplig tidskrift, 2013

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.

Single-molecule transport

Non-equilibrium Green’s functions

Break junctions

Quantum interference


C.R. Arroyo

TU Delft

R. Frisenda

TU Delft

Kasper Moth-Poulsen

Chalmers, Kemi- och bioteknik, Polymerteknologi

J.S. Seldenthuis

TU Delft

T. Bjornholm

Köpenhamns universitet

Herre van der Zant

TU Delft

Nanoscale Research Letters

1931-7573 (ISSN) 1556-276X (eISSN)

Vol. 8 1 234

ELectric Field control Over Spin molecules (ELFOS)

Europeiska kommissionen (EU) (EC/FP7/270369), 2011-01-01 -- 2014-02-28.





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