Spatially resolving edge states of chiral graphene nanoribbons
Chenggang Tao,Chenggang Tao,Liying Jiao,Oleg V. Yazyev,Oleg V. Yazyev,Yen-Chia Chen,Yen-Chia Chen,Juanjuan Feng,Juanjuan Feng,Xiaowei Zhang,Xiaowei Zhang,Rodrigo B. Capaz,Rodrigo B. Capaz,James M. Tour,Alex Zettl,Alex Zettl,Steven G. Louie,Steven G. Louie,Hongjie Dai,Michael F. Crommie,Michael F. Crommie +20 more
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In this paper, a study using scanning tunnelling microscopy and spectroscopy reveals how chirality at the atomically well-defined edges of a graphene nanoribbon affects its electronic structure.Abstract:
Edge effects matter in graphene, particularly in nanoribbons. A study using scanning tunnelling microscopy and spectroscopy reveals how chirality at the atomically well-defined edges of a graphene nanoribbon affects its electronic structure.read more
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References
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Energy band-gap engineering of graphene nanoribbons.
TL;DR: It is found that the energy gap scales inversely with the ribbon width, thus demonstrating the ability to engineer the band gap of graphene nanostructures by lithographic processes.
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Chemically Derived, Ultrasmooth Graphene Nanoribbon Semiconductors
TL;DR: A chemical route to produce graphene nanoribbons with width below 10 nanometers was developed, as well as single ribbons with varying widths along their lengths or containing lattice-defined graphene junctions for potential molecular electronics.
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Energy Gaps in Graphene Nanoribbons
TL;DR: The authors' ab initio calculations show that the origin of energy gaps for GNRs with armchair shaped edges arises from both quantum confinement and the crucial effect of the edges, which differs from the results of simple tight-binding calculations or solutions of the Dirac's equation based on them.
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Edge state in graphene ribbons: Nanometer size effect and edge shape dependence.
TL;DR: It is found that a non-negligible edge state survives even in graphene ribbons with less developed zigzag edges, when the system size is on a nanometer scale.
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Half-metallic graphene nanoribbons
TL;DR: In this article, it was shown that if in-plane homogeneous electric fields are applied across the zigzag-shaped edges of the graphene nanoribbons, their magnetic properties can be controlled by the external electric fields.