Role of Symmetry in the Transport Properties of Graphene Nanoribbons under Bias
arXiv:1005.0115 · doi:10.1103/PhysRevLett.100.206802
Abstract
The intrinsic transport properties of zigzag graphene nanoribbons (ZGNRs) are investigated using first principles calculations. It is found that although all ZGNRs have similar metallic band structure, they show distinctly different transport behaviors under bias voltages, depending on whether they are mirror symmetric with respect to the midplane between two edges. Asymmetric ZGNRs behave as conventional conductors with linear current-voltage dependence, while symmetric ZGNRs exhibit unexpected very small currents with the presence of a conductance gap around the Fermi level. This difference is revealed to arise from different coupling between the conducting subbands around the Fermi level, which is dependent on the symmetry of the systems.
4 pages, 4 figures
References in corpus (8)
- Electric Field Effect in Atomically Thin Carbon Films
- Energy Band Gap Engineering of Graphene Nanoribbons
- Energy Gaps in Graphene Nanoribbons
- Half-Metallic Graphene Nanoribbons
- Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics
- Valley filter and valley valve in graphene
- Room-temperature ballistic transport in narrow graphene strips
- Coherent transport in graphene nanoconstrictions
Cited by in corpus (18)
- Charge Transport in Disordered Graphene-Based Low Dimensional Materials
- Anomalous Doping Effects on Charge Transport in Graphene Nanoribbons
- Electronic Structures of SiC Nanoribbons
- Unveiling the Electric-current-limiting and Photodetection Effect in Two-dimensional Hydrogenated Borophene
- Dirac Fermion in Strongly-Bound Graphene Systems
- Spin negative differential resistance in edge doped zigzag graphene nanoribbons
- Quantum blockade and loop current induced by a single lattice defect in graphene nanoribbons
- Giant magnetoresistance and spin Seebeck coefficient in zigzag a-graphyne nanoribbons
- Spontaneous edge-defect formation and defect-induced conductance suppression in graphene nanoribbons
- MoB2:a new multifunctional transition metal diboride monolayer
- Band bending and zero-conductance resonances controlled by edge electric fields in zigzag silicene nanoribbons
- Half-metallicity in aluminum-doped zigzag silicene nanoribbons
- Parity Conservation in Electron-Phonon Scattering in Zigzag Graphene Nanoribbon
- Transport gap engineering by contact geometry in graphene nanoribbons: Experimental and theoretical studies on artificial materials
- Edge and sublayer degrees of freedom for phosphorene nanoribbons with twofold-degenerate edge bands via electric field
- Single and multiple doping effects on electron transport in zigzag silicene nanoribbons
- Mechanical Manipulations on Electronic Transport of Graphene Nanoribbons
- Nonlinear Transport through ultra-narrow Zigzag Graphene Nanoribbons: non-equilibrium charge and bond currents