Topological nodal lines and hybrid Weyl nodes in YCoC${}_2$

Abstract

Based on first-principles calculations and effective model analysis, we propose that the noncentrosymmetric superconductor YCoC${}_2$ in normal state is a topological semimetal. In the absence of spin-orbit coupling (SOC), it can host two intersecting nodal rings protected by two mirror planes, respectively. One ring is composed of type-I nodes, where the two crossing bands have opposite slop sign in their dispersions. The other ring consists of both type-I and type-II nodes (the slop signs of the two bands are the same in certain direction). In the presence of SOC, the former nodal ring is gapped totally while the later one evolves into ten pairs of Weyl nodes, with two of them being type-I and eight being type-II. The type-II Weyl nodes are further classified into two kinds with different velocity matrix when described in Weyl equation near the nodes. Fermi arcs from topological surface states are observed in the surface projected energy dispersions. It is notably that YCoC${}_2$ has been reported as a superconductor with critical temperature $T_c$ of 4.2 K. This makes it very attractive since including superconducting into topological semimetal state might result in topological superconductivity and be used to synthesize Majorana zero modes.

References in corpus (65)

• Topological Insulators
• Topological insulators and superconductors
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Classification of topological quantum matter with symmetries
• WannierTools: An open-source software package for novel topological materials
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Maximally-localized Wannier functions for entangled energy bands
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Topological Materials: Weyl Semimetals
• Dirac semimetal in three dimensions
• Experimental discovery of Weyl semimetal TaAs
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Colloquium: Topological Band Theory
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Experimental Realization of a Three-Dimensional Dirac Semimetal
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• The (High Quality) Topological Materials In The World
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• Catalogue of Topological Electronic Materials
• Dirac Line Nodes in Inversion Symmetric Crystals
• Topological Nodal Line Semimetal and Dirac Semimetal State in Antiperovskite Cu${}_3$PdN
• Towards ideal topological materials: Comprehensive database searches using symmetry indicators
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Topological nodal line semimetals
• Topological Semimetals
• Nodal-chain metals
• Topological Semimetals Predicted from First-principles Calculations
• 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
• Line of Dirac Nodes in Hyper-Honeycomb Lattices
• Triple Point Topological Metals
• Dirac and Weyl Superconductors in Three Dimensions
• Topological Semimetals with Triply Degenerate Nodal Points in θ-phase Tantalum Nitride
• Node-Surface and Node-Line Fermions From Nonsymmorphic Lattice Symmetries
• Symmetry-protected ideal Weyl semimetal in HgTe-class materials
• Towards Three-Dimensional Weyl-SurfaceSemimetals in Graphene Networks
• Type-II nodal loops: theory and material realization
• Co-existence of Weyl Fermion and Massless Triply Degenerate Nodal Points
• Efficient Topological Materials Discovery Using Symmetry Indicators
• Nonsymmorphic-symmetry-protected hourglass Dirac loop, nodal line, and Dirac point in bulk and monolayer $X_3$SiTe${}_6$ ($X=$ Ta, Nb)
• From Nodal Chain Semimetal To Weyl Semimetal in HfC
• Hourglass Dirac Chain Metal in Rhenium Dioxide
• Coexistence of four-band nodal rings and triply-degenerate nodal points in centrosymmetric metal diborides
• Pseudospins and topological effects of phonons in a Kekule lattice
• Ideal Weyl semimetals in the chalcopyrites CuTlSe2, AgTlTe2, AuTlTe2 and ZnPbAs2
• Nodal Loop and Nodal Surface States in Ti3Al Family Materials
• Correlation-driven topological phase transition from in-plane magnetized quantum anomalous Hall to Mott insulating phase in monolayer transition metal trichlorides
• Exploration and prediction of topological electronic materials based on first-principles calculations
• Two-dimensional Spin-Orbit Dirac Point in Monolayer HfGeTe
• Hybrid Dirac Semimetal in CaAgBi Materials Family
• $d$-Orbital Topological Insulator and Semimetal in Antifluorite Cu${}_2$S Family: Contrasting Spin Helicities, Nodal Box, and Hybrid Surface States
• Berry Phase and Topological Effects of Phonons
• Topological Materials Discovery By Large-order symmetry indicators
• Topological Insulator to Dirac Semimetal Transition Driven by Sign Change of Spin-Orbit Coupling in Thallium Nitride
• Hourglass-like Nodal Net Semimetal in Ag2BiO3
• Almost ideal nodal-loop semimetal in monoclinic CuTeO${}_3$ material
• Pseudo Dirac Nodal Sphere: Unusual Electronic Structure and Material Realization
• Experimental observation of node-line-like surface states in LaBi

Cited by in corpus (11)

• Theoretical realization of hybrid Weyl state and associated high catalytic performance for hydrogen evolution in NiSi
• Topological Electronic States in HfRuP Family Superconductors
• Tunable chirality of noncentrosymmetric magnetic Weyl semimetals
• Coexistence of topological Weyl and nodal-ring states in ferromagnetic and ferrimagnetic double perovskites
• Anisotropic non-linear optical response of nodal loop materials
• Magnetotransport Properties and Fermi Surface Topology of Nodal line Semimetal InBi
• Possible multiband superconductivity in the quaternary carbide YRe2SiC
• Symmetry-enforced planar nodal chain phonons in non-symmorphic materials
• Topological properties of non-centrosymmetric superconductors $T$Ir${}_2$B${}_2$ ($T$=Nb, Ta)
• Interplay between inversion and translation symmetries in trigonal PtBi${}_2$
• Topological States in Chevrel Phase Materials from First-principle Calculations