Signatures of Weyl fermion annihilation in a correlated kagome magnet
arXiv:2105.14034 · doi:10.1103/PhysRevLett.127.256403
Abstract
The manipulation of topological states in quantum matter is an essential pursuit of fundamental physics and next-generation quantum technology. Here we report the magnetic manipulation of Weyl fermions in the kagome spin-orbit semimetal CoSnS, observed by high-resolution photoemission spectroscopy. We demonstrate the exchange collapse of spin-orbit-gapped ferromagnetic Weyl loops into paramagnetic Dirac loops under suppression of the magnetic order. We further observe that topological Fermi arcs disappear in the paramagnetic phase, suggesting the annihilation of exchange-split Weyl points. Our findings indicate that magnetic exchange collapse naturally drives Weyl fermion annihilation, opening new opportunities for engineering topology under correlated order parameters.
arXiv commentAccepted version. Comments welcome! Early version of this manuscript first submitted in January 2020. See also: arXiv:2005.02400, Co3Sn2S2
References in corpus (44)
- Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
- Weyl and Dirac Semimetals in Three Dimensional Solids
- WannierTools: An open-source software package for novel topological materials
- Weyl Semimetal in a Topological Insulator Multilayer
- Wannier90 as a community code: new features and applications
- Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
- Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
- Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
- Massive Dirac fermions in a ferromagnetic kagome metal
- Magnetic Weyl Semimetal Phase in a Kagome Crystal
- Dirac Line Nodes in Inversion Symmetric Crystals
- 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
- Evidence for Magnetic Weyl Fermions in a Correlated Metal
- Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal
- Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
- Discovery of a quantum limit Chern magnet TbMn6Sn6
- Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
- Discovery of Weyl fermion semimetals and topological Fermi arc states
- Direct optical detection of Weyl fermion chirality in a topological semimetal
- Colossal Bulk Photovoltaic Effect in a Weyl Semimetal
- Weyl semimetal with broken time reversal and inversion symmetries
- Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
- Zero-field Nernst effect in a ferromagnetic kagome-lattice Weyl-semimetal Co3Sn2S2
- Electronic Transport and quantum oscillation of Topological Semimetals
- Line-Node Dirac Semimetal and Topological Insulating Phase in Noncentrosymmetric Pnictides CaAgX (X = P, As)
- Gyrotropic magnetic effect and the magnetic moment on the Fermi surface
- Topological surface Fermi arcs in the magnetic Weyl semimetal CoSnS
- Weyl, Dirac and high-fold chiral fermions in topological quantum materials
- Surface states in bulk single crystal of topological semimetal CoSnS towards water oxidation
- A facility for the analysis of the electronic structures of solids and their surfaces by synchrotron radiation photoelectron spectroscopy
- Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet
- Topological phonons and Weyl lines in 3 dimensions
- From colossal to zero: Controlling the Anomalous Hall Effect in Magnetic Heusler Compounds via Berry Curvature Design
- Magnetic tunneling induced Weyl node annihilation in TaP
- Fractionalized Topological Insulators
- Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
- Intrinsic anomalous Hall effect in Ni-substituted magnetic Weyl semimetal Co3Sn2S2
- Temperature-induced band shift in ferromagnetic Weyl semimetal Co3Sn2S2
- Topological surface superconductivity in doped Weyl loop materials
- Fermi arc plasmons in Weyl semimetals
- Weyl and Dirac Loop Superconductors
- Spin-to-charge conversion in magnetic Weyl semimetals
- Sound of Fermi arcs
Cited by in corpus (17)
- Topological kagome magnets and superconductors
- Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films
- What's knot to like? Observation of a linked loop quantum state
- Endless Dirac nodal lines in kagome-metal Ni3In2S2
- Intrinsic Magnetic Topological Materials
- Electronic structure evolution of the magnetic Weyl semimetal CoSnS with hole and electron doping
- Pressure-Driven Magneto-Topological Phase Transition in a magnetic Weyl semimetal
- Electronic band structures of topological kagome materials
- Light-induced anomalous Hall conductivity in massive 3D Dirac semimetal CoSnS
- Nodal line resonance generating the giant anomalous Hall effect of CoSnS
- Engineering holographic flat fermionic bands
- Enhancement of Spin-Charge Conversion Efficiency for CoSnS across Transition from Paramagnetic to Ferromagnetic Phase
- A topological Hund nodal line antiferromagnet
- Emergent Weyl Fermions in an Orbital Multipolar Ordering Phase
- Tunable Anomalous Hall Effect in a Kagome Ferromagnetic Weyl Semimetal
- Nature of magnetic exchange interactions in kagome antiferromagnets FeGe and FeSn
- Effect of superconductivity by Nb and V substitution in kagome CaPd5