Title :
Octagonal defect lines in graphene structures
Author :
Jaskolski, W. ; Pelc, Marta ; Chico, Leonor ; Ayuela, Andres
Author_Institution :
Inst. of Phys., Nicolaus Copernicus Univ., Torun, Poland
Abstract :
We study graphene nanoribbons and carbon nanotubes containing defect lines built of octagonal rings. All the calculations are performed within the π-electron tight binding approximation, taking into account electron interaction effects by means of the Hubbard model. Octagonal defect lines are the source of state localization at Fermi energy and in some cases may lead to spontaneous magnetization. We show that the localization is due to the zigzag nature of the edges of defect lines.
Keywords :
carbon nanotubes; graphene; Fermi energy; Hubbard model; carbon nanotubes; electron interaction effects; graphene nanoribbons; graphene structures; octagonal defect lines; octagonal rings; spontaneous magnetization; state localization; tight binding approximation; Carbon;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-4673-2198-3
DOI :
10.1109/NANO.2012.6322188