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Conductance Switching and Vibrational Fine Structure of a [2 × 2] CoII4 Gridlike Single Molecule Measured in a Three-Terminal Device

Authors

  • Edgar A. Osorio,

    1. Kavli Institute of Nanoscience Delft University of Technology PO Box 5046, 2600 GA, Delft (The Netherlands)
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  • Mario Ruben,

    Corresponding author
    1. Karlsruhe Institute of Technology (KIT) Institut für Nanotechnologie Postfach 3640, 76021 Karlsruhe (Germany)
    • Karlsruhe Institute of Technology (KIT) Institut für Nanotechnologie Postfach 3640, 76021 Karlsruhe (Germany).
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  • Johannes S. Seldenthuis,

    1. Kavli Institute of Nanoscience Delft University of Technology PO Box 5046, 2600 GA, Delft (The Netherlands)
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  • Jean M. Lehn,

    1. Karlsruhe Institute of Technology (KIT) Institut für Nanotechnologie Postfach 3640, 76021 Karlsruhe (Germany)
    2. ISIS, Université de Strasbourg 8, Allée Gaspard Monge BP 70028, F-67083 Strasbourg (France)
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  • Herre S. J. van der Zant

    Corresponding author
    1. Kavli Institute of Nanoscience Delft University of Technology PO Box 5046, 2600 GA, Delft (The Netherlands)
    • Kavli Institute of Nanoscience Delft University of Technology PO Box 5046, 2600 GA, Delft (The Netherlands).
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  • We thank Kevin O'Neill for the work on electromigration, and Maarten Wegewijs and Jos Thijssen for useful discussions. Financial support was obtained from the Dutch Organization for Fundamental Research on Matter (FOM), the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), the EU FP7 programme under the grant agreement SINGLE, and the Deutsche Forschungsgemeinschaft (DFG) within the Priority Program Quantrans.

Abstract

original image

Three-terminal transport is studied in molecular junctions incorporating a single gridlike [CoII4L4] (BF4)8 metallosupramolecular species. The recorded differential conductance as a function of gate and bias voltage (see image) shows reproducible switching behavior in the Coulomb diamonds. BF4 counter ions in the vicinity of the molecular junction acting as offset charges are the most likely cause of the observed phenomena.

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