A quantum circuit rule for interference effects in single-molecule electrical junctions

Manrique, David Zsolt; Huang, Cancan; Baghernejad, Masoud; Zhao, Xiaotao; Al-Owaedi, Oday A.; Sadeghi, Hatef; Kaliginedi, Veerabhadrarao; Hong, Wenjing; Gulcur, Murat; Wandlowski, Thomas; Bryce, Martin R.; Lambert, Colin J.

doi:10.1038/ncomms7389

A quantum circuit rule for interference effects in single-molecule electrical junctions

Manrique, David Zsolt; Huang, Cancan; Baghernejad, Masoud; Zhao, Xiaotao; Al-Owaedi, Oday A.; Sadeghi, Hatef; Kaliginedi, Veerabhadrarao; Hong, Wenjing; Gulcur, Murat; Wandlowski, Thomas; Bryce, Martin R.; Lambert, Colin J.

Authors

David Zsolt Manrique

Cancan Huang

Masoud Baghernejad

Xiaotao Zhao

Oday A. Al-Owaedi

Hatef Sadeghi

Veerabhadrarao Kaliginedi

Wenjing Hong

Murat Gulcur

Thomas Wandlowski

Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor

Colin J. Lambert

Abstract

A quantum circuit rule for combining quantum interference effects in the conductive properties of oligo(phenyleneethynylene) (OPE)-type molecules possessing three aromatic rings was investigated both experimentally and theoretically. Molecules were of the type X-Y-X, where X represents pyridyl anchors with para (p), meta (m) or ortho (o) connectivities and Y represents a phenyl ring with p and m connectivities. The conductances GXmX (GXpX) of molecules of the form X-m-X (X-p-X), with meta (para) connections in the central ring, were predominantly lower (higher), irrespective of the meta, para or ortho nature of the anchor groups X, demonstrating that conductance is dominated by the nature of quantum interference in the central ring Y. The single-molecule conductances were found to satisfy the quantum circuit rule Gppp/Gpmp=Gmpm/Gmmm. This demonstrates that the contribution to the conductance from the central ring is independent of the para versus meta nature of the anchor groups.

Citation

Manrique, D. Z., Huang, C., Baghernejad, M., Zhao, X., Al-Owaedi, O. A., Sadeghi, H., …Lambert, C. J. (2015). A quantum circuit rule for interference effects in single-molecule electrical junctions. Nature Communications, 6, Article 6389. https://doi.org/10.1038/ncomms7389

Journal Article Type	Article
Acceptance Date	Jan 26, 2015
Online Publication Date	Mar 3, 2015
Publication Date	2015
Deposit Date	Mar 26, 2015
Publicly Available Date	Apr 2, 2015
Journal	Nature Communications
Publisher	Nature Research
Peer Reviewed	Peer Reviewed
Volume	6
Article Number	6389
DOI	https://doi.org/10.1038/ncomms7389