Ideal inner nodal chain semimetals in Li2XY (X = Ca, Ba; Y = Si, Ge) materials

Abstract

The chain-type nodal loops in the reciprocal space can generate exotic nodal chain fermions. Here, we report that Li2XY (X = Ca, Ba; Y = Si, Ge) compounds are ideal inner nodal chain semimetals. Their band structures are composed of two connecting nodal loops with either hybrid or type-I band dispersion. The signatures of the nodal chain, such as the nontrivial surface states, are quite pronounced in these Li2XY compounds since there is only a single inner nodal chain without other extraneous bands near the Fermi level. These compounds are existing materials and ambient-stable, which is available to realize the experimental detection of inner nodal chain fermions or further the practical applications.

arXiv comment5 pages, 4 figures

References in corpus (61)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl Semimetal in a Topological Insulator Multilayer
• The Chiral Magnetic Effect
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Dirac semimetal in three dimensions
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• 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
• Topological response in Weyl semimetals and the chiral anomaly
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Dirac Line Nodes in Inversion Symmetric Crystals
• Topological Nodal Line Semimetal and Dirac Semimetal State in Antiperovskite Cu${}_3$PdN
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Topological nodal line semimetals
• Recent developments in transport phenomena in Weyl semimetals
• Nodal-chain metals
• Topological nodal-line fermions in ZrSiSe and ZrSiTe
• Weyl semimetal with broken time reversal and inversion symmetries
• Spin-orbit-free Weyl-loop and Weyl-point semimetals in a stable three-dimensional carbon allotrope
• Nodal surface semimetals: Theory and material realization
• Potential ring of Dirac nodes in a new polymorph of Ca${}_3$P${}_2$
• Large nonsaturating magnetoresistance and signature of non-degenerate Dirac nodes in ZrSiS
• Dirac and Weyl Superconductors in Three Dimensions
• Nodal-link semimetals
• Node-Surface and Node-Line Fermions From Nonsymmorphic Lattice Symmetries
• Topological Hopf and chain link semimetal states and their application to Co2MnGa (Theory and Materials Prediction)
• Towards Three-Dimensional Weyl-SurfaceSemimetals in Graphene Networks
• Anomalous orbital magnetism in Dirac-electron systems: Role of pseudo-spin paramagnetism
• Type-II nodal loops: theory and material realization
• Dirac node lines in pure alkali earth metals
• Topological semimetals with double-helix nodal link
• Robust Type-II Weyl Semimetal Phase in Transition Metal Diphosphides XP${}_2$ (X = Mo, W)
• Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
• Experimental discovery of nodal chains
• 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
• Artificial gravity field, astrophysical analogues, and topological phase transitions in strained topological semimetals
• Nodal Loop and Nodal Surface States in Ti3Al Family Materials
• CaTe: a new topological node-line and Dirac semimetal
• Three-dimensional Pentagon Carbon with a genesis of emergent fermions
• Quadratic and Cubic Nodal Lines Stabilized by Crystalline Symmetry
• Topological Dirac States and Pairing Correlations in the Non-Centrosymmetric Superconductor PbTaSe2
• Hybrid Nodal Loop Metal: Unconventional Magnetoresponse and Material Realization
• Weyl-link semimetals
• Hybrid Dirac Semimetal in CaAgBi Materials Family
• Quadratic contact point semimetal: Theory and material realization
• $d$-Orbital Topological Insulator and Semimetal in Antifluorite Cu${}_2$S Family: Contrasting Spin Helicities, Nodal Box, and Hybrid Surface States
• A Class of topological nodal rings and its realization in carbon networks
• From Type-II Triply Degenerate Nodal Points and Three-Band Nodal Rings to Type-II Dirac Points in Centrosymmetric Zirconium Oxide
• Floquet Weyl semimetals in light-irradiated type-II and hybrid line-node semimetals
• Exotic Superconducting Properties in Topological Nodal Semimetal PbTaSe${}_2$
• Nodeless superconductivity in noncentrosymmetric PbTaSe${}_2$ single crystals
• Topological Phase with Critical-Type Nodal Line State in Intermetallic CaPd
• Crossing-Line-Node Semimetals: General Theory and Application to Rare-Earth Trihydrides
• Transverse Shift in Andreev Reflection
• Topological Crystalline Metal in Orthorhombic Perovskite Iridates

Cited by in corpus (8)

• Ferromagnetic hybrid nodal loop and switchable type-I and type-II Weyl fermions in two-dimension
• Topological carbon materials: a new perspective
• The centrosymmetric Li2NaN material: an ideal topological semimetal with critical-type triply degenerate nodal points
• Topological Nodal Line Electrides: Realization of Ideal Nodal Line State Nearly Immune from Spin-Orbit Coupling
• Fully spin-polarized nodal chain state in half metal LiV${}_2$O${}_4$
• Symmetry-enforced topological band crossings in orthorhombic crystals: Classification and materials discovery
• Weyl nodal point-line Fermion in ferromagnetic Eu${}_5$Bi${}_3$
• Spin and charge transport in topological nodal-line semimetals