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Manifestation of bound states and coupling to leads in coherent transmission through multiterminal molecular conductors
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology. Laboratory on Quantum Theory in Linköping, International Society for Independent Research, Sweden.
Laboratory on Quantum Theory in Linköping, International Society for Independent Research, Sweden and Bogolyubov Institute for Theoretical Physics, Kyiv, Ukraine .
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 86, no 8Article in journal (Refereed) Published
Abstract [en]

We examine analytically a rarely if ever addressed issue: the effects of scattering at the conductor-lead interfaces on the transmittivity of N-terminal molecular conductors. The feeding leads are not one-dimensional and the strength of wire-lead coupling is allowed to be arbitrary. The conductor imbedded into a circuit is supposed to be a Y junction of three identical molecular wires or of two identical wires and one different wire. The wire connector is a C-H group and wires are conjugated and/or saturated oligo(hydro)carbons. The spectrum of branched oligo(hydro)carbons is rationalized in terms of extended and bound states. The junctions, where identical wires are equally coupled to the respective leads (all-symmetric junctions), are compared with hybrid junctions, where nonequivalence of terminal-to-terminal transmission appears due to either not identical wires or not equal coupling, or both. These model systems reveal incredible potentials of branched oligo(hydro)carbons for engineering a variety of molecular electronic devices. In addition, the role of wire connectors, atomic and molecular, is briefly discussed. Some of the obtained results are valid for N-terminal starlike junctions. © 2012 American Physical Society.

Place, publisher, year, edition, pages
American Physical Society , 2012. Vol. 86, no 8
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-101126DOI: 10.1103/PhysRevB.86.085413OAI: oai:DiVA.org:liu-101126DiVA: diva2:665570
Available from: 2013-11-20 Created: 2013-11-19 Last updated: 2017-12-06Bibliographically approved

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Onipko, Alexander

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