Controlled contact to a C-60 molecule

N. Neel, J. Kröger, L. Limot, Thomas Frederiksen, Mads Brandbyge

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    Abstract

    The tip of a low-temperature scanning tunneling microscope is approached towards a C-60 molecule adsorbed at a pentagon-hexagon bond on Cu(100) to form a tip-molecule contact. The conductance rapidly increases to approximate to 0.25 conductance quanta in the transition region from tunneling to contact. Ab-initio calculations within density functional theory and nonequilibrium Green's function techniques explain the experimental data in terms of the conductance of an essentially undeformed C-60. The conductance in the transition region is affected by structural fluctuations which modulate the tip-molecule distance.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume98
    Issue number6
    Pages (from-to)065502
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • TRANSPORT
    • QUANTIZED CONDUCTANCE
    • DNA-MOLECULES
    • SCANNING-TUNNELING-MICROSCOPY
    • POINT-CONTACT

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