Films of rhombohedral graphite as two-dimensional topological semimetals
arXiv:1905.13094 · doi:10.1038/s42005-019-0268-8
Abstract
Topologically non-trivial states characterized by Berry curvature appear in a number of materials ranging from spin-orbit-coupling driven topological insulators to graphene. In multivalley conductors, such as mono- and bilayer graphene, despite a zero total Chern number for the entire Brillouin zone, Berry curvature with different signs concentrated in different valleys can affect the observable material's transport characteristics. Here we consider thin films of rhombohedral graphite, which appear to retain truly two-dimensional properties up to tens of layers of thickness and host two-dimensional electron states with a large Berry curvature, accompanied by a giant intrinsic magnetic moment carried by electrons. The size of Berry curvature and magnetization in the vicinity of each valley can be controlled by electrostatic gating leading to a tuneable anomalous Hall effect and a peculiar structure of the two-dimensional Landau level spectrum.
arXiv comment24 pages, 7 figures
References in corpus (38)
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Topological Insulators
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Berry Phase Effects on Electronic Properties
- Anomalous Hall effect
- A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Landau level degeneracy and quantum Hall effect in a graphite bilayer
- Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
- Asymmetry gap in the electronic band structure of bilayer graphene
- Wave-packet dynamics in slowly perturbed crystals: Gradient corrections and Berry-phase effects
- Electronic states and Landau levels in graphene stacks
- Topological confinement in bilayer graphene
- Stacking-Dependent Band Gap and Quantum Transport in Trilayer Graphene
- Spontaneous Quantum Hall States in Chirally-stacked Few-Layer Graphene Systems
- Determination of the gate-tunable bandgap and tight-binding parameters in bilayer graphene using infrared spectroscopy
- Trigonal warping and Berry's phase N pi in ABC-stacked multilayer graphene
- Existence and topological stability of Fermi points in multilayered graphene
- Chiral Decomposition in the Electronic Structure of Graphene Multilayers
- Pseudospin Magnetism in Graphene
- Spontaneous symmetry breaking and Lifshitz transition in bilayer graphene
- Valley-Hall Kink and Edge States in Multilayer Graphene
- Dimensional crossover in topological matter: Evolution of the multiple Dirac point in the layered system to the flat band on the surface
- Lattice Theory of Pseudospin Ferromagnetism in Bilayer Graphene: Competing Orders and Interaction Induced Quantum Hall States
- High-temperature surface superconductivity in rhombohedral graphite
- Modern semiclassical theory of magnetic transport and breakdown
- Flat Electronic Bands in Long Sequences of Rhombohedral-stacked Multilayer Graphene
- Experimental approval of the extended flat bands and gapped subbands in rhombohedral multilayer graphene
- Magnetic gap opening in rhombohedral-stacked multilayer graphene from first principles
- Density-functional investigation of rhombohedral stacks of graphene: topological surface states, nonlinear dielectric response, and bulk limit
- Stacking transition in rhombohedral graphite
- Two topologically distinct Dirac-line semimetal phases and topological phase transitions in rhombohedrally stacked honeycomb lattices
- Anisotropic Strain Induced Soliton Movement Changes Stacking Order and Bandstructure of Graphene Multilayers
- Evolution and dimensional crossover from the bulk subbands in ABC-stacked graphene to a three-dimensional Dirac cone structure in rhombohedral graphite
- Magnetic ratchet effect in bilayer graphene
- Spectroscopic Signatures of Electronic Excitations in Raman Scattering in Thin Films of Rhombohedral Graphite
- Gap generation in ABC-stacked multilayer graphene: screening vs band flattening