Half-metallic Dirac cone in zigzag-graphene-nanoribbon/graphene
arXiv:1509.04647 · doi:10.1103/PhysRevB.94.035433
Abstract
The Dirac electrons of graphene, an intrinsic zero gap semiconductor, uniquely carry spin and pseudospin that give rise to many fascinating electronic and transport properties. While isolated zigzag graphene nanoribbons are antiferromagnetic semiconductors, we show by means of first-principles and tight-binding calculations that zigzag graphene nanoribbons supported on graphene are half-metallic as a result of spin- and pseudospin-symmetry breaking. In particular, half-metallic Dirac cones are formed at K (K') near the Fermi level. The present results demonstrate that the unique combination of spin and pseudospin in zigzag graphene nanoribbons may be used to manipulate the electronic properties of graphene, and may have practical implications for potential graphene-based nanoelectronic applications.
arXiv comment6 pages, 8 figures, minor changes
References in corpus (21)
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Van der Waals heterostructures
- Energy Band Gap Engineering of Graphene Nanoribbons
- Van der Waals density functionals applied to solids
- Half-Metallic Graphene Nanoribbons
- Substrate-induced band gap opening in epitaxial graphene
- Valley Dependent Optoelectronics from Inversion Symmetry Breaking
- Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons
- Structure, Stability, Edge States and Aromaticity of Graphene Ribbons
- Enhanced Half-Metallicity in Edge-Oxidized Zigzag Graphene Nanoribbons
- Spin and valley quantum Hall ferromagnetism in graphene
- Suppression of spin-polarization in graphene nanoribbon by edge defect and impurity
- Experimentally Engineering the Edge Termination of Graphene Nanoribbons
- Making a field effect transistor on a single graphene nanoribbon by selective doping
- Theory of inter-edge superexchange in zigzag edge magnetism
- Epitaxial graphene on SiC(0001): More than just honeycombs
- Revealing the substrate origin of the linear dispersion of silicene/Ag(111)
- Electronic and magnetic properties of zigzag graphene nanoribbons on the (111) surface of Cu, Ag and Au
- Broken SU(4) Symmetry and The Fractional Quantum Hall Effect in Graphene
- Zigzag graphene nanoribbons without inversion symmetry