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

Author

C.R. Arroyo

Delft University of Technology

R. Frisenda

Delft University of Technology

Kasper Moth-Poulsen

Chalmers, Chemical and Biological Engineering, Polymer Technology

J.S. Seldenthuis

Delft University of Technology

T. Bjornholm

University of Copenhagen

Herre van der Zant

Delft University of Technology

Nanoscale Research Letters

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

Vol. 8 1 234

ELectric Field control Over Spin molecules (ELFOS)

European Commission (FP7), 2011-01-01 -- 2014-02-28.

Subject Categories

Chemical Sciences

DOI

10.1186/1556-276X-8-234

More information

Latest update

5/17/2018