Electrical transport across metal/two-dimensional carbon junctions: Edge versus side contacts

Details Electrical transport across metal/two-dimensional carbon junctions: Edge versus side contacts Electrical transport across metal/two-dimensional carbon junctions: Edge versus side contacts

2012-02-03

arxiv.org/abs/1202.0615v1

AIP Advances 2, 012132 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.3684617

Metal/two-dimensional carbon junctions are characterized by using a nanoprobe in an ultrahigh vacuum environment. Significant differences were found in bias voltage (V) dependence of differential conductance (dI/dV) between edge- and side-contact; the former exhibits a clear linear relationship (i.e., dI/dV \propto V), whereas the latter is characterized by a nonlinear dependence, dI/dV \propto V3/2. Theoretical calculations confirm the experimental results, which are due to the robust two-dimensional nature of the carbon materials under study. Our work demonstrates the importance of contact geometry in graphene-based electronic devices.

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