Mesoscopic Electronic Transport in Twisted Bilayer Graphene
arXiv:1911.07277 · doi:10.1103/PhysRevB.101.235432
Abstract
We numerically investigate the electronic transport properties between two mesoscopic graphene disks with a twist by employing the density functional theory coupled with non-equilibrium Green's function technique. By attaching two graphene leads to upper and lower graphene layers separately, we explore systematically the dependence of electronic transport on the twist angle, Fermi energy, system size, layer stacking order and twist axis. When choose different twist axes for either AA- or AB-stacked bilayer graphene, we find that the dependence of conductance on twist angle displays qualitatively distinction, i.e., the systems with "top" axis exhibit finite conductance oscillating as a function of the twist angle, while the ones with "hollow" axis exhibit nearly vanishing conductance for different twist angles or Fermi energies near the charge neutrality point. These findings suggest that the choice of twist axis can effectively tune the interlayer conductance, making it a crucial factor in designing of nanodevices with the twisted van der Waals multilayers.
References in corpus (36)
- Van der Waals heterostructures
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Moire bands in twisted double-layer graphene
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene
- Graphene bilayer with a twist: electronic structure
- Observation of Van Hove singularities in twisted graphene layers
- Flat Bands in Slightly Twisted Bilayer Graphene
- ab initio modeling of open systems: charge transfer, electron conduction, and molecular switching of a C_{60} device
- Localization of Dirac electrons by Moire patterns in graphene bilayers
- Single Layer Behavior and Its Breakdown in Twisted Graphene Layers
- Continuum Model of the Twisted Bilayer
- Tunable Moiré Bands and Strong Correlations in Small-Twist-Angle Bilayer Graphene
- All "Magic Angles" Are "Stable" Topological
- Commensuration and Interlayer Coherence in Twisted Bilayer Graphene
- Electronic structure of turbostratic graphene
- Superlattice-induced insulating states and valley-protected orbits in twisted bilayer graphene
- Faithful Tight-binding Models and Fragile Topology of Magic-angle Bilayer Graphene
- Failure of Nielsen-Ninomiya theorem and fragile topology in two-dimensional systems with space-time inversion symmetry: application to twisted bilayer graphene at magic angle
- Numerical studies of confined states in rotated bilayers of graphene
- Ab-Initio Theory of Moiré Superlattice Bands in Layered Two-Dimensional Materials
- Quasicrystalline 30° Twisted Bilayer Graphene as an Incommensurate Superlattice with Strong Interlayer Coupling
- Topologically Protected Helical States in Minimally Twisted Bilayer Graphene
- Quantum valley Hall effect, orbital magnetism, and anomalous Hall effect in twisted multilayer graphene systems
- Transport Between Twisted Graphene Layers
- Electronic Structure Theory of Weakly Interacting Bilayers
- Transport through a network of topological states in twisted bilayer graphene
- Interlayer interaction in general incommensurate atomic layers
- Electronic spectrum of twisted bilayer graphene
- Breakdown of the interlayer coherence in twisted bilayer graphene
- Interlayer coupling in rotationally faulted multilayer graphenes
- Phonon mediated interlayer conductance in twisted graphene bilayers
- Transport measurements in twisted bilayer graphene: Electron-phonon coupling and Landau level crossing
- DC conductivity of twisted bilayer graphene: Angle-dependent transport properties and effects of disorder
- Electron-phonon scattering and in-plane electric conductivity in twisted bilayer graphene