Endless Dirac nodal lines in kagome-metal Ni3In2S2

Abstract

Topological semimetals are a frontier of quantum materials. In multi-band electronic systems, topological band-crossings can form closed curves, known as nodal lines. In the presence of spin-orbit coupling and/or symmetry-breaking operations, topological nodal lines can break into Dirac/Weyl nodes and give rise to novel transport properties, such as the chiral anomaly and giant anomalous Hall effect. Recently the time-reversal symmetry-breaking induced Weyl fermions are observed in a kagome-metal Co3Sn2S2, triggering interests in nodal-line excitations in multiband kagome systems. Here, using first-principles calculations and symmetry based indicator theories, we find six endless nodal lines along the stacking direction of kagome layers and two nodal rings in the kagome plane in nonmagnetic Ni3 In2 S2 . The linear dipsersive electronic structure, confirmed by angle-resolved photoemission spectroscopy, induces large magnetoresistance up to 2000% at 9 T. Our results establish a diverse topological landscape of multi-band kagome metals.

4 figures, 7 pages

References in corpus (15)

• Topological Insulators with Inversion Symmetry
• High temperature fractional quantum Hall states
• Fractional quantum Hall states at zero magnetic field
• Nearly-flat bands with nontrivial topology
• Topological nodal line semimetals
• Fractional quantum Hall effect in the absence of Landau levels
• Discovery of a quantum limit Chern magnet TbMn6Sn6
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Fantastic flat bands and where to find them: The CoSn-type compounds
• Topological Kagome magnet Co3Sn2S2 thin flakes with high electron mobility and large anomalous Hall effect
• On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2
• Tuning the flat bands of the kagome metal CoSn with Fe, In, or Ni doping
• Wide applicability of high $T_c$ pairing originating from coexisting wide and incipient narrow bands in quasi one dimension
• Predicting topological materials: symmetry-based indicator theories and beyond
• Topological phase transitions in strongly correlated systems: application to Co${}_3$Sn${}_2$S${}_2$

Cited by in corpus (7)

• FeGe as a building block for the kagome 1:1, 1:6:6, and 1:3:5 families: hidden d-orbital decoupling of flat band sectors, effective models and interaction Hamiltonians
• Kagome metals
• Chemical Rules for Stacked Kagome and Honeycomb Topological Semimetals
• Electronic band structures of topological kagome materials
• Quantum oscillation studies of the nodal line semimetal Ni3In2S2-xSex
• Precompression engineering of metal-insulator transition and magnetism in designed breathing kagome systems
• Electronic and structural properties of Rh- and Pd-based kagome layered shandites from first principles