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

Carlos R Arroyo; Riccardo Frisenda; Kasper Moth-Poulsen; Johannes S Seldenthuis; Thomas Bjørnholm; Herre Sj van der Zant

doi:10.1186/1556-276X-8-234

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

Carlos R Arroyo, Riccardo Frisenda, Kasper Moth-Poulsen, Johannes S Seldenthuis, Thomas Bjørnholm, Herre Sj van der Zant

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36 Citationer (Scopus)

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.

Originalsprog	Engelsk
Tidsskrift	Nanoscale Research Letters
Vol/bind	8
Udgave nummer	1
Sider (fra-til)	234
ISSN	1931-7573
DOI	https://doi.org/10.1186/1556-276X-8-234
Status	Udgivet - 1 dec. 2013

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10.1186/1556-276X-8-234

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AU - Arroyo, Carlos R

AU - Frisenda, Riccardo

AU - Moth-Poulsen, Kasper

AU - Seldenthuis, Johannes S

AU - Bjørnholm, Thomas

AU - van der Zant, Herre Sj

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N2 - 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.

AB - 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.

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JO - Nanoscale Research Letters

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

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