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

Content Provider	Europe PMC
Author	Arroyo, Carlos R Frisenda, Riccardo Moth-Poulsen, Kasper Seldenthuis, Johannes S Bjørnholm, Thomas van der Zant, Herre SJ
Copyright Year	2013
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.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	8
PubMed Central reference number	PMC3663707
Issue Number	1
PubMed reference number	23679986
e-ISSN	1556276X
DOI	10.1186/1556-276x-8-234
Language	English
Publisher	Springer
Publisher Date	2013-05-16
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright ©2013 Arroyo et al.; licensee Springer.
Subject Keyword	Single-molecule transport Quantum interference Break junctions Non-equilibrium Green’s functions
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science