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Last updated on April 24, 2014 at 17:35 EDT

Latest Ballistic conduction Stories

2014-04-08 16:01:27

A new theoretical study shows the conductivity conditions under which graphene nanoribbons can become switches in externally controlled electronic devices One of graphene’s most sought-after properties is its high conductivity. Argentinian and Brazilian physicists have now successfully calculated the conditions of the transport, or conductance mechanisms, in graphene nanoribbons. The results, recently published in a paper in EPJ B, yield a clearer theoretical understanding of...

New Type Of Electronic Device Suggested By Ballistic Transport In Graphene
2014-02-06 11:59:13

Georgia Institute of Technology Using electrons more like photons could provide the foundation for a new type of electronic device that would capitalize on the ability of graphene to carry electrons with almost no resistance even at room temperature – a property known as ballistic transport. Research reported this week shows that electrical resistance in nanoribbons of epitaxial graphene changes in discrete steps following quantum mechanical principles. The research shows that the...

New Device Architecture For 2D Materials Developed Making Electrical Contact From The 1D Edge
2013-10-31 14:05:13

Columbia University Columbia Engineering researchers have experimentally demonstrated for the first time that it is possible to electrically contact an atomically thin two-dimensional (2D) material only along its one-dimensional (1D) edge, rather than contacting it from the top, which has been the conventional approach. With this new contact architecture, they have developed a new assembly technique for layered materials that prevents contamination at the interfaces, and, using graphene as...

2012-01-23 13:26:12

Physicists at the University of New South Wales have observed a new kind of interaction that can arise between electrons in a single-atom silicon transistor. The findings, to be published this week in the journal Physical Review Letters, offer a more complete understanding of the mechanisms for electron transport in nanostructures at the atomic level. "We have been able to study some of the most complicated transport mechanisms that can arise up to the single atom level," says lead...

2011-11-07 16:45:22

How massless electrons tunnel through energy barriers in a carbon sheet called graphene Electrons moving in graphene behave in an unusual way, as demonstrated by 2010 Nobel Prize laureates for physics Andre Geim and Konstantin Novoselov, who performed transport experiments on this one-carbon-atom-thick material. A review article, just published in EPJ B´, explores the theoretical and experimental results to date of electrons tunneling through energy barriers in graphene. As good an...

2011-04-28 00:23:40

Valley-based electronics, also known as valleytronics, is one step closer to reality. Two researchers at the Naval Research Laboratory (NRL) have shown that the valley degree of freedom in graphene can be polarized through scattering off a line defect. Unlike previously proposed valley filters in graphene, which rely on confined structures that have proven hard to achieve experimentally, the present work is based on a naturally occurring line defect that has already been observed. The...

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2011-03-22 09:16:44

A new "templated growth" technique for fabricating nanoribbons of epitaxial graphene has produced structures just 15 to 40 nanometers wide that conduct current with almost no resistance. These structures could address the challenge of connecting graphene devices made with conventional architectures "“ and set the stage for a new generation of devices that take advantage of the quantum properties of electrons. "We can now make very narrow, conductive nanoribbons that have quantum...