Suppression of electron–vibron coupling in graphene nanoribbons contacted via a single atom

Joost van der Lit, Mark P. Boneschanscher, Daniël Vanmaekelbergh, Mari Ijäs, Andreas Uppstu, Mikko Ervasti, Ari Harju, Peter Liljeroth () and Ingmar Swart ()
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Joost van der Lit: Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University
Mark P. Boneschanscher: Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University
Daniël Vanmaekelbergh: Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University
Mari Ijäs: COMP Centre of Excellence and Helsinki Institute of Physics, Aalto University School of Science
Andreas Uppstu: COMP Centre of Excellence and Helsinki Institute of Physics, Aalto University School of Science
Mikko Ervasti: COMP Centre of Excellence and Helsinki Institute of Physics, Aalto University School of Science
Ari Harju: COMP Centre of Excellence and Helsinki Institute of Physics, Aalto University School of Science
Peter Liljeroth: Aalto University School of Science
Ingmar Swart: Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University

Nature Communications, 2013, vol. 4, issue 1, 1-6

Abstract: Abstract Graphene nanostructures, where quantum confinement opens an energy gap in the band structure, hold promise for future electronic devices. To realize the full potential of these materials, atomic-scale control over the contacts to graphene and the graphene nanostructure forming the active part of the device is required. The contacts should have a high transmission and yet not modify the electronic properties of the active region significantly to maintain the potentially exciting physics offered by the nanoscale honeycomb lattice. Here we show how contacting an atomically well-defined graphene nanoribbon to a metallic lead by a chemical bond via only one atom significantly influences the charge transport through the graphene nanoribbon but does not affect its electronic structure. Specifically, we find that creating well-defined contacts can suppress inelastic transport channels.

Date: 2013
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DOI: 10.1038/ncomms3023

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