Structured Graphene: from Ballistic Transport to
Electronics

de Heer, Walter A.

Title:

Structured Graphene: from Ballistic Transport to Electronics

dc.contributor.author	de Heer, Walter A.	en_US
dc.contributor.corporatename	Georgia Institute of Technology. School of Physics	en_US
dc.date.accessioned	2013-12-13T17:58:00Z
dc.date.available	2013-12-13T17:58:00Z
dc.date.issued	2013-12-02
dc.description	Presented on December 2, 2013 from 3:00 to 4:00 pm in Howey-Physics Building and Observatory, L3.	en_US
dc.description	Runtime: 59:41 minutes.	en_US
dc.description.abstract	The original concept of graphene electronics focused on carbon nanotube properties. Carbon nanotubes were known to be high mobility ballistic, phase coherent conductors and quantum confinement effects produced significant bandgaps. However, it turns out to be very difficult to develop nanotube electronics platform for a variety of reasons including fundamental physical constraints related to the quantum mechanical properties of the metal-to-nanotube contacts. Graphene electronics can in principle overcome the major problems because graphene structures can be patterned using conventional lithography and dissipation at contacts can be controlled. However, these developments rely on the premise that narrow, ballistic graphene ribbons can be produced. Experiments on conventionally patterned graphene structures produced from graphene that is deposited on insulating substrates have been discouraging. The graphene ribbon mobilities are so low due to edge roughness effects, to render this direction to be impracticable. On the other hand, graphene produced on silicon carbide turns has been found to be more immune to edge scattering problems. Moreover, recent developments of template grown graphene structures on silicon carbide are promising. Very narrow ballistic graphene ribbons that demonstrate ballistic transport properties, have been produced with these methods which again brings the original concept of graphene based nanoelectronics back into play.	en_US
dc.format.extent	59:41 minutes
dc.identifier.uri	http://hdl.handle.net/1853/49831
dc.language.iso	en_US	en_US
dc.publisher	Georgia Institute of Technology	en_US
dc.relation.ispartofseries	Physics Colloquium
dc.subject	Structured graphene	en_US
dc.title	Structured Graphene: from Ballistic Transport to Electronics	en_US
dc.type	Moving Image
dc.type.genre	Lecture
dspace.entity.type	Publication
local.contributor.author	de Heer, Walter A.
local.contributor.corporatename	College of Sciences
local.contributor.corporatename	School of Physics
local.relation.ispartofseries	Physics Colloquium
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