NDLI: Ballistic Transport in Graphene Nanoribbons on the Limits of Electron Transport in High-mobility Bilayer Graphene

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Ballistic Transport in Graphene Nanoribbons on the Limits of Electron Transport in High-mobility Bilayer Graphene

Content Provider	Semantic Scholar
Author	Heer, Walter A. De Hankinson, John Berger, Claire Terres, Bernat Epping, Alexander Khodkov, Tymofiy Watanabe, Kenji Taniguchi, Takashi Beschoten, Bernd Stampfer, Christoph Karimi, Farhad
Copyright Year	2014
Abstract	Graphene nanoribbons are essential components in future graphene nanoelectronics. However, in typical nanoribbons produced from lithographically patterned exfoliated graphene, the charge carriers travel only about 10 nanometers between scattering events, resulting in minimum sheet resistances of about 1 kW In contrast 40 nm wide graphene nanoribbons that are epitaxially grown on silicon carbide are single channel room temperature ballistic conductors on greater than 10 μm length scale, similarly to metallic carbon nanotubes. This is equivalent to sheet resistances below 1W surpassing theoretical predictions for perfect graphene by at least an order of magnitude. In neutral graphene ribbons, we show that transport is dominated by two modes. One is ballistic and temperature independent; the other is thermally activated. Transport is protected from back-scattering, possibly reflecting ground state properties of neutral graphene. At room temperature the resistance of both modes abruptly increases non-linearly with increasing length, one at a length of 16 μm and the other at 160 nm. Besides their importance for fundamental science, since epitaxial graphene nanoribbons are readily produced by the thousands, their room temperature ballistic transport properties can be used in advanced nanoelectronics as well.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.icps2014.org/abstracts/Carbon_Nanotubes_Graphene_V.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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