Two-dimensional topological nodal line semimetal in layered $X_{2}Y$ ($X$ = Ca, Sr, and Ba; $Y$ = As, Sb, and Bi)

Abstract

In topological semimetals the Dirac points can form zero-dimensional and one-dimensional manifolds, as predicted for Dirac/Weyl semimetals and topological nodal line semimetals, respectively. Here, based on first-principles calculations, we predict a topological nodal line semimetal phase in the two-dimensional compounds $X_{2}Y$ ($X$=Ca, Sr, and Ba; $Y$=As, Sb, and Bi) in the absence of spin-orbit coupling (SOC) with a band inversion at the M point. The mirror symmetry as well as the electrostatic interaction, that can be engineered via strain, are responsible for the nontrivial phase. In addition, we demonstrate that the exotic edge states can be also obtained without and with SOC although a tiny gap appears at the nodal line for the bulk states when SOC is included.

References in corpus (10)

• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Potential ring of Dirac nodes in a new polymorph of Ca${}_3$P${}_2$
• Line of Dirac Nodes in Hyper-Honeycomb Lattices
• Maximally Localized Wannier Functions within the FLAPW formalism
• Dimensional crossover in topological matter: Evolution of the multiple Dirac point in the layered system to the flat band on the surface
• Topological semimetals and topological insulators in rare earth monopnictides
• Topological Crystalline Metal in Orthorhombic Perovskite Iridates
• Dirac node lines in a two-dimensional bipartite square lattice

Cited by in corpus (22)

• Prediction of two-dimensional nodal-line semimetal in a carbon nitride covalent network
• Two-dimensional honeycomb borophene oxide: Strong anisotropy and nodal loop transformation
• Electrides as a New Platform of Topological Materials
• Topological carbon materials: a new perspective
• Mixed topological semimetals driven by orbital complexity in two-dimensional ferromagnets
• Sign-tunable anomalous Hall effect induced by two-dimensional symmetry-protected nodal structures in ferromagnetic perovskite oxide thin films
• Optical conductivity of three and two dimensional topological nodal line semimetals
• Multiple-Fold Fermions and Topological Fermi Arcs Induced Catalytic Enhancement in Nanoporous Electride C12A7
• Two-dimensional topological semimetals
• Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
• Fully spin-polarized nodal loop semimetals in alkaline-metal monochalcogenide monolayers
• Electronic Transport Evidence for Topological Nodal-Line Semimetals of ZrGeSe single crystals
• Density-independent plasmons for terahertz-stable topological metamaterials
• Topological semimetal phases manifested in transition metal dichalcogenides intercalated with 3d metals
• Two-dimensional topological semimetal states in monolayers Cu${}_2$Ge, Fe${}_2$Ge, and Fe${}_2$Sn
• Anisotropic non-linear optical response of nodal loop materials
• Magnetotransport Properties and Fermi Surface Topology of Nodal line Semimetal InBi
• Interlocking nodal chains and their examples in carbon networks
• Two-dimensional Dirac nodal loop magnons in collinear antiferromagnets
• Topological Nodal-line Semimetals in Two Dimensions with time-reversal symmetry breaking
• Topological semimetal phases in a family of monolayer X3YZ6 (X=Nb,Ta, Y=Si,Ge,Sn, Z=S,Se,Te) with abundant nodal lines and nodes
• Essentially degenerate hidden nodal lines in two-dimensional magnetic layer groups