Volume 101, Number 6, March 2013
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||04 April 2013|
Rectifying performance and negative differential resistance behavior in graphite-chain-nanoribbon junctions
1 Department of Civil and Architectural Engineering, City University of Hong Kong - Kowloon, Hong Kong
2 School of Physics and Electronic Science, Changsha University of Science and Technology - Changsha 410114, PRC
Received: 16 January 2013
Accepted: 10 March 2013
Electronic transport properties of graphite-nanoribbon conjunctions bridged by carbon atomic chains have been investigated. The first-principles calculations show that their I-V characteristics display odd-even effects. Specifically, current in odd-numbered chains is carried by resonances originating from the hybridization of the surface of the graphite electrode, chain and nanoribbon states, while even-numbered chains are mediated by tunneling between the graphite electrode and chain states. The rectifying performance in our models was found to be a result of asymmetric distortions of conducting resonances of the graphite electrode and chain states. It was also found that odd-numbered chains exhibit NDR behaviors caused by depressed chain states.
PACS: 85.65.+h – Molecular electronic devices / 73.63.Nm – Quantum wires / 73.23.-b – Electronic transport in mesoscopic systems
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.