Symmetry-protected Dirac nodal lines and large spin Hall effect in with kagome bilayer
arXiv:2203.01558 · doi:10.1103/PhysRevB.105.155102
Abstract
Recently, a family of nonmagnetic kagome metals \textit{A} (\textit{A}=K, Rb, and Cs) has attracted significant attention for realizing the intertwining of quantum order and nontrivial topology. However, these compounds have been identified to host complex band structures. Therefore, it is desirable to design and synthesize novel kagome materials with a simple band topology and good transport properties. In this study, using first-principles calculations, we present the electronic properties and the intrinsic spin Hall effect of VSb, the latest experimentally synthesized vanadium-based compounds with a kagome bilayer. In the absence of spin-orbital coupling (SOC), this compound is a Dirac nodal line semimetal with symmetry-protected nodal rings near the Fermi level. Within the SOC, the spin-rotation symmetry breaks the gaps of the nodal rings with a small band gap. Furthermore, based on the Wannier tight-binding approach and the Kubo formula, we propose a large spin Hall effect in VSb, which intrinsically originates from the spin Berry curvature. Our work further expands nonmagnetic kagome compounds for applications in spintronics accompanied by exotic quantum order.
arXiv comment6 Pages, and 4 figures
References in corpus (36)
- Topological Insulators in Three Dimensions
- Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
- Maximally localized Wannier functions: Theory and applications
- Quantum Spin Liquid States
- Spin Liquid Ground State of the Kagome Heisenberg Model
- CsVSb: a topological kagome metal with a superconducting ground state
- Massive Dirac fermions in a ferromagnetic kagome metal
- Dirac Line Nodes in Inversion Symmetric Crystals
- Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
- Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
- Topological insulator on the kagome lattice
- Cascade of correlated electron states in a kagome superconductor CsV3Sb5
- Discovery of a quantum limit Chern magnet TbMn6Sn6
- Charge density waves and electronic properties of superconducting kagome metals
- Superconductivity in the kagome metal KVSb
- Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal
- Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsVSb
- Superconductivity and normal-state properties of kagome metal RbV3Sb5 single crystals
- On A Proper Definition of Spin Current
- Irvsp: to obtain irreducible representations of electronic states in the VASP
- Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal
- Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 (A=Rb,Cs)
- Chiral flux phase in the Kagome superconductor AVSb
- Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsVSb
- Giant intrinsic spin Hall effect in the TaAs family of Weyl semimetals
- Calculation of intrinsic spin Hall conductivity by Wannier interpolation
- Doped Kagome System as Exotic Superconductor
- Ab initio calculation of intrinsic spin Hall effect in semiconductors
- Unified theory of PT and CP invariant topological metals and nodal superconductors
- Highly-robust reentrant superconductivity in CsV3Sb5 under pressure
- Anisotropic superconducting properties of Kagome metal CsV3Sb5
- Electronic correlations in the normal state of kagome superconductor KVSb
- Strongly correlated fermions on a kagome lattice
- Fractionally charged topological point defects on the kagome lattice
- Interplay of charge and spin fluctuations of strongly interacting electrons on the kagome lattice
- Type-II Nodal Line Fermions in New Z2 Topological Semimetals AV6Sb6 (A=K, Rb,and Cs) with Kagome Bilayer