Electronic, Magnetic and Transport Properties of Graphene Ribbons Terminated by Nanotubes
arXiv:1210.3501 · doi:10.1088/1367-2630/14/12/123012
Abstract
We study by density functional and large scale tight-binding transport calculations the electronic structure, magnetism and transport properties of the recently proposed graphene ribbons with edges rolled to form nanotubes. Edges with armchair nanotubes present magnetic moments localized either in the tube or the ribbon and metallic or half-metallic character, depending on the symmetry of the junction. These properties have potential for spin valve and spin filter devices with advantages over other proposed systems. Edges with zigzag nanotubes are either metallic or semiconducting without affecting the intrinsic mobility of the ribbon. By varying the type and size of the nanotubes and ribbons offers the possibility to tailor the magnetic and transport properties, making these systems very promising for applications.
9 pages, 5 figures
References in corpus (15)
- Energy Band Gap Engineering of Graphene Nanoribbons
- Energy Gaps in Graphene Nanoribbons
- Half-Metallic Graphene Nanoribbons
- Emergence of magnetism in graphene materials and nanostructures
- Peculiar Width Dependence of the Electronic Property of Carbon Nanoribbons
- Self-passivating edge reconstructions of graphene
- Magnetic Correlations at Graphene Edges
- Structure, Stability, Edge States and Aromaticity of Graphene Ribbons
- Spin Filtered Edge States and Quantum Hall Effect in Graphene
- Resonant scattering by realistic impurities in graphene
- From Graphene constrictions to single carbon chains
- Modeling electronic structure and transport properties of graphene with resonant scattering centers
- Robustness of edge states in graphene quantum dots
- Dirac boundary condition at the reconstructed zigzag edge of graphene
- Low energy graphene edge termination via small diameter nanotube formation