Topological and nodal superconductor kagome magnesium triboride
arXiv:2207.12031 · doi:10.1103/PhysRevMaterials.7.014205
Abstract
Recently the kagome compounds have inspired enormous interest and made some great progress such as in the field of superconductivity and topology. Here we predict a different kagome magnesium triboride (MgB3) superconductor with a calculated Tc ~12.2 K and Tc ~15.4 K by external stress, the potentially highest among the reported diverse kagome-type superconductors. We reveal its various exotic physical properties including the van Hove singularity, flat-band, multiple Dirac points, and nontrivial topology. The system can be described by a two-band model with highly anisotropic superconducting gaps on Fermi surfaces. Its topological and nodal superconducting nature is unveiled by a recently developed symmetry indicators method. Our results suggest that MgB3 can be a new platform to study exotic physics in the kagome structure, and pave a way to seek for more superconductors and topological materials with XY3-type kagome lattice.
6 pages, 4 figures
References in corpus (34)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Advanced capabilities for materials modelling with Quantum ESPRESSO
- Quantum ESPRESSO toward the exascale
- CsVSb: a topological kagome metal with a superconducting ground state
- Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
- Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
- Unconventional Fermi surface instabilities in the Kagome Hubbard Model
- Time-reversal symmetry-breaking charge order in a kagome superconductor
- Charge density waves and electronic properties of superconducting kagome metals
- Superconductivity in the kagome metal KVSb
- Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsVSb
- First-principles Green's-function method for surface calculations: a pseudopotential localized basis set approach
- Chiral flux phase in the Kagome superconductor AVSb
- Electronic Nature of Charge Density Wave and Electron-Phonon Coupling in Kagome Superconductor KVSb
- Origin of the Charge Density Wave in the Kagome Metal CsVSb as Revealed by Optical Spectroscopy
- Improved tetrahedron method for the Brillouin-zone integration applicable to response functions
- Fermi level tuning and double-dome superconductivity in the kagome metals CsVSbSn
- Fantastic flat bands and where to find them: The CoSn-type compounds
- Universal scaling of the critical temperature and the strange-metal scattering rate in unconventional superconductors
- Flat-Bands-Enabled Triplet Excitonic Insulator in a Di-atomic Kagome Lattice
- Competing orders at higher-order Van Hove points
- Double-dome superconductivity under pressure in the V-based Kagome metals AV3Sb5 (A = Rb and K)
- Strong coupling nature of kagome superconductivity in LaRuSi
- -enriched symmetry indicators for topological superconductors in the 1651 magnetic space groups
- A new class of bilayer kagome lattice compounds with Dirac nodal lines and pressure-induced superconductivity
- Pressure-induced dimensional crossover in a kagome superconductor
- Superconductivity in intercalated group-IV honeycomb structures
- Evaluating the exfoliation of two-dimensional materials with a Green's function surface model
- Anisotropic superconducting gaps in YNiBC: A first-principles investigation
- Gapless excitations inside the fully gapped kagome superconductors AVSb
- High-throughput Investigations of Topological and Nodal Superconductors
- MgB2 single crystals substituted with Li and with Li-C: Structural and superconducting properties
- Faithful derivation of symmetry indicators: A case study for topological superconductors with time-reversal and inversion symmetries
- Symmetry-based approach to nodal structures: Unification of compatibility relations and gapless point classifications