Metallic Network of Topological Domain Walls
arXiv:1904.12826 · doi:10.1103/PhysRevB.101.201403
Abstract
We study the electronic and transport properties of a network of domain walls between insulating domains with opposite valley Chern numbers. We find that the network is semi-metallic with Dirac dispersion near the charge neutrality point and the corresponding electronic states distribute along the domain walls. Near the charge neutrality point, we find quantized conductance in nanoribbon with sawtooth domain wall edges that propagates along the boundaries and is robust against weak disorder. For a trident edged ribbon, we find a small energy gap due to the finite size effect making the nanoribbon an insulator. When the Fermi energy is away from charge neutrality point, all domain walls contribute to the conduction of current. Our results provide a comprehensive analysis of the electronic transport properties in a topological domain wall network that not only agrees qualitatively with experiments on marginally twisted bilayer graphene under a perpendicular electric field, but also can provide useful insights for designing low-power topological quantum devices.
References in corpus (36)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Atomic and electronic reconstruction at van der Waals interface in twisted bilayer graphene
- Strain Solitons and Topological Defects in Bilayer Graphene
- Topological confinement in bilayer graphene
- Valley Chern Numbers and Boundary Modes in Gapped Bilayer Graphene
- Photonic crystals for nano-light in moiré graphene superlattices
- Dynamic band structure tuning of graphene moiré superlattices with pressure
- Topologically Protected Helical States in Minimally Twisted Bilayer Graphene
- Gate-controlled topological conducting channels in bilayer graphene
- Quantum valley Hall effect, orbital magnetism, and anomalous Hall effect in twisted multilayer graphene systems
- Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene
- Band structure and topological property of twisted double bilayer graphenes
- Electronic Highways in Bilayer Graphene
- Valley-Hall Kink and Edge States in Multilayer Graphene
- A valley valve and electron beam splitter
- Helical networks in twisted bilayer graphene under interlayer bias
- Transport through a network of topological states in twisted bilayer graphene
- Helical Network Model for Twisted Bilayer Graphene
- Giant oscillations in a triangular network of one-dimensional states in marginally twisted graphene
- Electrically tunable gauge fields in tiny-angle twisted bilayer graphene
- Heterostrain engineering on twisted graphene bilayer around the first magic angle
- Accurate Gap Determination in Monolayer and Bilayer Graphene/h-BN Moire Superlattices
- Current partition at topological zero-line intersections
- Perfect Valley Filter in Topological Domain Wall
- Twists and The Electronic Structure of Graphitic Materials
- Designing multi-directional energy-splitters and topological valley supernetworks
- van der Waals Heterostructures of Germanene, Stanene and Silicene with Hexagonal Boron Nitride and Their Topological Domain Walls
- Manipulation and Characterization of the Valley Polarized Topological Kink States in Graphene Based Interferometers
- Superconductor versus insulator in twisted bilayer graphene
- Current partition at zero-line intersection of quantum anomalous Hall topologies
- Zero-line modes at stacking faulted domain walls in multilayer graphene
- Gate tunable current partition in graphene based topological zero lines
- The role of geometry and topological defects in the 1D zero-line modes of graphene
- Topological Zero-Line Modes in Folded Bilayer Graphene
- Analytical solutions of the two-dimensional Dirac equation for a topological channel intersection
Cited by in corpus (16)
- Twistronics in graphene-based van der Waals structures
- Multi-scale lattice relaxation in general twisted trilayer graphenes
- Plasmonic Dirac Cone in Twisted Bilayer Graphene
- Hofstadter butterfly and Floquet topological insulators in minimally twisted bilayer graphene
- Valley-Current Splitter in Minimally Twisted Bilayer Graphene
- Charge density wave and finite-temperature transport in minimally twisted bilayer graphene
- Kagomé network of chiral miniband-edge states in double-aligned graphene-hexagonal boron nitride structures
- Electrically tunable correlated domain wall network in twisted bilayer graphene
- Evidence of the ferroelectric polarization in charge transport through WTe Weyl semimetal surface
- Arrays of one-dimensional conducting channels in minimally twisted bilayer graphene
- Physical Origin of Current Partition at a Topological Trifurcation
- Topological phase transition from periodic edge states in moiré superlattices
- Band engineering aided by topological edge state proximity effects: Inducing anti-chirality in graphene
- Quasi-two-dimensional spin helix and magnon-induced singularity in twisted bilayer graphene
- Twisted bilayer graphene as a terahertz plasmonic crystal
- Coupled-wire descriptions of unconventional quantum states in twisted nanostructures