Design triple points, nexus points and related topological phases by stacking monolayers
arXiv:1908.09467 · doi:10.1063/1.5111061
Abstract
Triple points and nexus points are two interesting topological phases, which have been reported in some three-dimensional (3D) materials. Here, we propose that triple points, nexus points and related phases, such as topological tangle nodal lines, can be obtained by alternatively stacking two types of monolayers. Two conditions for the stacking monolayers are required: the first condition is that they have a three-fold (C3) rotation symmetry and three mirror planes along the C3 axis; the second condition is that one of the monolayers should be insulating while the other one should be metallic (or semiconducting) and has a double degenerate band and a nondegenerate band at Γpoint around the Fermi level. Hexagonal boron nitride (HBN) and α/α^'-boron sheets (α/α^'-BS) are suggested as candidate materials. Even if HBN is a wide-gap insulator, the interactions between layers lead to crossings of the nondegenerate and double degenerate bands along the direction normal to the nanosheets, and thus form triple/nexus points or related phases. A tight-binding model is adopted to explain the phase transition between triple points, nexus points and other related phases.
References in corpus (42)
- Topological Insulators
- Graphene: Status and Prospects
- Topological Insulators in Three Dimensions
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
- The (High Quality) Topological Materials In The World
- Experimental observation of Weyl points
- Topological nodal line semimetals with and without spin-orbital coupling
- Catalogue of Topological Electronic Materials
- Dirac Line Nodes in Inversion Symmetric Crystals
- Topological Nodal Line Semimetal and Dirac Semimetal State in Antiperovskite CuPdN
- Towards ideal topological materials: Comprehensive database searches using symmetry indicators
- Nodal-chain metals
- Experimental Observation of Three-Component 'New Fermions' in Topological Semimetal MoP
- Spin-orbit-free Weyl-loop and Weyl-point semimetals in a stable three-dimensional carbon allotrope
- Nodal surface semimetals: Theory and material realization
- Triple Point Topological Metals
- Topological Semimetals with Triply Degenerate Nodal Points in θ-phase Tantalum Nitride
- Type-II Dirac fermions in the PtSe class of transition metal dichalcogenides
- Topological Hopf and chain link semimetal states and their application to Co2MnGa (Theory and Materials Prediction)
- Topological nodal-line semimetals in alkaline-earth stannides, germanides and silicides
- Towards Three-Dimensional Weyl-SurfaceSemimetals in Graphene Networks
- Co-existence of Weyl Fermion and Massless Triply Degenerate Nodal Points
- New fermions on the line in topological symmorphic metals
- Nodal Loop and Nodal Surface States in Ti3Al Family Materials
- Three-dimensional Pentagon Carbon with a genesis of emergent fermions
- Nexus and Dirac lines in topological materials
- Prediction of triple point fermions in simple half-Heusler topological insulators
- Band-Contact Lines in Electron Energy Spectrum of Graphite
- From Type-II Triply Degenerate Nodal Points and Three-Band Nodal Rings to Type-II Dirac Points in Centrosymmetric Zirconium Oxide
- Momentum-space structure of surface states in a topological semimetal with a nexus point of Dirac lines
- The centrosymmetric Li2NaN material: an ideal topological semimetal with critical-type triply degenerate nodal points
- Topological Materials Discovery By Large-order symmetry indicators
- Coexistence of New Fermions in Topological Semimetal TaS
- Geometrically protected triple-point crossings in an optical lattice
- Nodal-chain network, intersecting nodal rings and triple points coexisting in nonsymmorphic Ba3Si4
- Hopf-chain networks evolved from triple points
- Coexistence of Triple Nodal Points, Nodal Links, and Unusual Flat Bands in intermetallic Pd (=Pb, Sn)
- Nexus networks in carbon honeycombs
- Noncentrosymmetric compensated half-metal hosting pure spin Weyl nodes, triple nodal points, nodal loops, and nexus fermions
- Prediction of Ideal Triple Degenerate Points in HfIrAs and HfIrBi