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Electronic properties of graphene grain boundaries

AuthorsAyuela, Andrés ; Jaskólski, W.; Santos, Hernán; Chico, Leonor
Issue Date2014
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 16: 083018 (2014)
AbstractGrain boundaries and defect lines in graphene are intensively studied for their novel electronic and magnetic properties. However, there is not a complete comprehension of the appearance of localized states along these defects. Graphene grain boundaries are herein seen as the outcome of matching two semi-infinite graphene sheets with different edges. We classify the energy spectra of grain boundaries into three different types, directly related to the combination of the four basic classes of spectra of graphene edges. From the specific geometry of the grains, we are able to obtain the band structure and the number of localized states close to the Fermi energy. This provides a new understanding of states localized at grain boundaries, showing that they are derived from the edge states of graphene. Such knowledge is crucial for the ultimate tailoring of electronic and optoelectronic applications.
DescriptionContent from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Publisher version (URL)http://dx.doi.org/10.1088/1367-2630/16/8/083018
Identifiersdoi: 10.1088/1367-2630/16/8/083018
issn: 1367-2630
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