Symmetry-protected Spinful Magnetic Weyl Nodal Loops and Multi-Weyl Nodes in $5d^n$ Cubic Double Perovskites $(n=1,2)$

Abstract

Using both an effective three-band model and {\it ab initio} calculations, we have investigated various topological features in the cubic ferromagnetic $5d^{1,2}$ systems showing large spin-orbit coupling (SOC): Ba${}_2$NaOsO${}_6$, Sr${}_2$SrOsO${}_6$, and Ba${}_2$$B$ReO${}_6$ ($B$= Mg, Zn). In the presence of time-reversal symmetry ($\mathcal{T}$), spinless Dirac nodal loops linked to each other at the $W$ points appear in the mirror planes. Remarkably, breaking $\mathcal{T}$ leads to spinful magnetic Weyl nodal loops (MWNLs) that are robust even at large SOC and correlation strength $U$ variation due to the combination of mirror symmetry and broken $\mathcal{T}$. Additionally, there are two types of magnetic Weyl points with chiral charges $|\chi |=1,2$ along the $C_{4v}$ symmetry line, and another type-II MWNL encircling the zone center, that are dependent on $U$. Furthermore, the ferromagnetic Ba${}_2$ZnReO${}_6$ is an ideal half semimetal with MWNLs and magnetic Weyl nodes at the Fermi level without the interference of topologically trivial bulk states. These systems give rise to a remarkably large anomalous Hall conductivity ${\sigma }_{xy}$ of up to 1160 ($\Omega$cm)${}^{-1}$. Our findings may apply widely for $t_{2g}$ systems with cubic (or slightly distorted) fcc-like structures.

arXiv comment10 pages with 9 embedded figures (mirror corrections)

References in corpus (72)

• Berry Phase Effects on Electronic Properties
• Anomalous Hall effect
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• WannierTools: An open-source software package for novel topological materials
• Type-II Weyl Semimetals
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Topological Crystalline Insulators
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Titanic Magnetoresistance in WTe2
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Chern Numbers in Discretized Brillouin Zone: Efficient Method of Computing (Spin) Hall Conductances
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Massive Dirac fermions in a ferromagnetic kagome metal
• Topological nodal line semimetals with and without spin-orbital coupling
• 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
• Dirac Cone Protected by Non-Symmorphic Symmetry and 3D Dirac Line Node in ZrSiS
• Surface States of the Topological Insulator Bi_{1-x}Sb_x
• Topological nodal line semimetals
• Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Berry phase effect in anomalous thermoelectric transport
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• High-temperature surface superconductivity in topological flat-band systems
• Wien2wannier: From linearized augmented plane waves to maximally localized Wannier functions
• Multiple types of topological fermions in transition metal silicides
• Topological Nature of Anomalous Hall Effect in Ferromagnet
• A new type of Weyl semimetal with quadratic double Weyl fermions in SrSi2
• Drumhead Surface States and Topological Nodal-Line Fermions in TlTaSe2
• Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
• Node-Surface and Node-Line Fermions From Nonsymmorphic Lattice Symmetries
• Topological Semimetals from first-principles
• Non-Abelian band topology in noninteracting metals
• Topological Hopf and chain link semimetal states and their application to Co2MnGa (Theory and Materials Prediction)
• Spin Density Functional Based Search for Half-Metallic Antiferromagnets
• Towards Three-Dimensional Weyl-SurfaceSemimetals in Graphene Networks
• Robust doubly charged nodal lines and nodal surfaces in centrosymmetric systems
• Type-II nodal loops: theory and material realization
• Wannier Center Sheets in Topological Insulators
• Topological semimetals with double-helix nodal link
• Nodal-knot semimetals
• Ferromagnetism in the Mott insulator Ba2NaOsO6
• Symmetry Demanded Topological Nodal-line Materials
• From Nodal Chain Semimetal To Weyl Semimetal in HfC
• Giant anomalous Nernst effect in the magnetic Weyl semimetal Co3Sn2S2
• Dirac and Weyl Materials: Fundamental Aspects and Some Spintronics Applications
• Composite Weyl nodes stabilized by screw symmetry with and without time reversal
• Half Semimetallic Antiferromagnetism in the Sr${}_2$CrTO${}_6$ System, T=Os, Ru
• Optical conductivity of multi-Weyl semimetals
• Topological responses from chiral anomaly in multi-Weyl semimetals
• Quadratic contact point semimetal: Theory and material realization
• Classification of stable Dirac and Weyl semimetals with reflection and rotational symmetry
• Weyl-loop half metal in Li${}_3$(FeO${}_3$)${}_2$
• Nodal Line Spin-gapless Semimetals and High-quality Candidate Materials
• Ferromagnetism above 1000 K in highly cation-ordered double-perovskite insulator Sr3OsO6
• Topological nodal-line semimetals in ferromagnetic rare-earth-metal monohalides
• Orbital-quenching-induced magnetism in Ba_2NaOsO_6
• Large anomalous Hall and Nernst effect from nodal line symmetry breaking in Fe${}_2$MnX (X=P,As,Sb)
• Hybrid Weyl Semimetal
• Characterization of topological band structures away from the Fermi level by anomalous Nernst measurements
• Spin-orbit coupling, strong correlation, and insulator-metal transitions: the J${}_{\mathrm{eff}}$ =3\2 ferromagnetic Mott insulator Ba${}_2$NaOsO${}_6$
• New class of 3D topological insulator in double perovskite
• Interaction driven surface Chern insulator in nodal line semimetals
• Perovskite ThTaN3: a Large Thermopower Topological Crystalline Insulator
• Coexistence of Triple Nodal Points, Nodal Links, and Unusual Flat Bands in intermetallic $\mathcal{A}$Pd${}_3$ ($\mathcal{A}$=Pb, Sn)
• Noncentrosymmetric compensated half-metal hosting pure spin Weyl nodes, triple nodal points, nodal loops, and nexus fermions

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