A graphene quantum dot realized by an armchair graphene nanoribbon with line defect. Issue 8 (26th June 2013)

• Record Type: Journal Article
• Authors: Sui, Xiao‐Yan; Li, Zhi‐Chao; Gong, Wei‐Jiang; Yu, Guo‐Dong; Chen, Xiao‐Hui
• Is Part Of: Physica status solidi. Volume 7:Issue 8(2013:Aug.)
• Page Start: 579
• Page End: 582
• Publication Date: 2013-06-26
• Subjects: Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201307152
• Languages: English
• ISSNs: 1862-6254

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The electron transport in a semiconducting armchair graphene nanoribbon with line defect is theoretically investigated, by coupling it to two normal metallic leads. It is found that the line defect induces a new localized quantum state near the Dirac point, and that the coupling between this state and the leads provides a channel for the resonant tunneling. This means that such a finite‐size nanoribbon can be viewed as a quantum dot. When two line defects are present simultaneously, a coupled quantum dot forms, leading to the splitting of the conductance peaks. With these results, we propose such a structure to be a promising candidate of an electron transistor. (© 2013 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)</p> </abstract>