Fabrication of hybrid molecular devices using multi-layer graphene break junctions

J. O. Island, A. Holovchenko, M. Koole, P. F.A. Alkemade, M. Menelaou, N. Aliaga-Alcalde, E. Burzurí, H. S.J. Van Der Zant

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    We report on the fabrication of hybrid molecular devices employing multi-layer graphene (MLG) flakes which are patterned with a constriction using a helium ion microscope or an oxygen plasma etch. The patterning step allows for the localization of a few-nanometer gap, created by electroburning, that can host single molecules or molecular ensembles. By controlling the width of the sculpted constriction, we regulate the critical power at which the electroburning process begins. We estimate the flake temperature given the critical power and find that at low powers it is possible to electroburn MLG with superconducting contacts in close proximity. Finally, we demonstrate the fabrication of hybrid devices with superconducting contacts and anthracene-functionalized copper curcuminoid molecules. This method is extendable to spintronic devices with ferromagnetic contacts and a first step towards molecular integrated circuits.

    Original languageEnglish
    Article number474205
    JournalJournal of Physics Condensed Matter
    Volume26
    Issue number47
    DOIs
    Publication statusPublished - 2014 Nov 26

    Keywords

    • Simmons tunneling model
    • break junction
    • copper curcuminoid molecule
    • heat equation
    • helium ion microsope
    • hybrid molecular device
    • multi-layer graphene

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

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