Passing Current through Touching Molecules

G. Schull, Thomas Frederiksen, Mads Brandbyge, R. Berndt

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    Abstract

    The charge flow from a single C-60 molecule to another one has been probed. The conformation and electronic states of both molecules on the contacting electrodes have been characterized using a cryogenic scanning tunneling microscope. While the contact conductance of a single molecule between two Cu electrodes can vary up to a factor of 3 depending on electrode geometry, the conductance of the C-60-C-60 contact is consistently lower by 2 orders of magnitude. First-principles transport calculations reproduce the experimental results, allow a determination of the actual C-60-C-60 distances, and identify the essential role of the intermolecular link in bi- and trimolecular chains.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume103
    Issue number20
    Pages (from-to)206803
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2009

    Bibliographical note

    Copyright 2009 American Physical Society

    Keywords

    • TRANSPORT
    • CONDUCTANCE
    • WIRES
    • TIPS
    • C-60
    • MICROSCOPY

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