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

Abstract

We report on the fabrication of hybrid molecular devices employing multilayer graphene (MLG) flakes which are patterned with a constriction using a helium ion microscope (HIM) 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.

arXiv comment17 pages, 5 figures

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Cited by in corpus (6)

• High current density electrical breakdown of TiS3 nanoribbon-based field-effect transistors
• Sequential electron transport and vibrational excitations in an organic molecule coupled to few-kayer graphene electrodes
• Vibrational effects in charge transport through a molecular double quantum dot
• Spin signatures in the electrical response of graphene nanogaps
• The heat equation for nanoconstrictions in 2D materials with Joule self-heating
• Rectification effect in organic junctions based on aryl thin films covalently attached to a multilayer graphene electrode