4.5 Article

Edge-states in graphene nanoribbons: a combined spectroscopy and transport study

Journal

JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 25, Issue 39, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/39/392001

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Funding

  1. German Research Foundation (DFG) [SPP 1459]

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Graphene structures of finite size are expected to reveal exceptional electronic and magnetic properties which are highly attractive for future nano-technological applications. In this study we have looked at the edge-states in graphene nanoribbons (GNR) grown by self-assembly on mesa structured SiC(0001) templates. By means of a 4-tip STM/SEM system, both local spectroscopy and lateral transport have been performed in situ on the same nanostructures. The conductance in these structures was found to be e(2)/h for temperatures up to 400 K. Scanning tunneling spectroscopy clearly reveals edge-localized states on these ribbons. The local bonding of these ribbons to their support turns out to be essential in order to preserve the metallicity of the edge-states.

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