Topological Signatures in Nodal Semimetals through Neutron Scattering

Abstract

Topological nodal semimetals are known to host a variety of fascinating electronic properties due to the topological protection of the band-touching nodes. Neutron scattering, despite its power in probing elementary excitations, has not been routinely applied to topological semimetals, mainly due to the lack of an explicit connection between the neutron response and the signature of topology. In this work, we theoretically investigate the role that neutron scattering can play to unveil the topological nodal features: a large magnetic neutron response with spectral non-analyticity can be generated solely from the nodal bands. A new formula for the dynamical structure factor for generic topological nodal metals is derived. For Weyl semimetals, we show that the locations of Weyl nodes, the Fermi velocities and the signature of chiral anomaly can all leave hallmark neutron spectral responses. Our work offers a neutron-based avenue towards probing bulk topological materials.

References in corpus (75)

• Topological Insulators
• Topological insulators and superconductors
• Topological Insulators in Three Dimensions
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Topological Crystalline Insulators
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Periodic table for topological insulators and superconductors
• Experimental discovery of Weyl semimetal TaAs
• Topological Insulator Materials
• Topological nodal semimetals
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Dielectric function, screening, and plasmons in 2D graphene
• Higher-Order Topological Insulators
• Topological quantum chemistry
• Colloquium: Topological Band Theory
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Topological Crystalline Insulators in the SnTe Material Class
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Experimental Realization of a Three-Dimensional Dirac Semimetal
• The (High Quality) Topological Materials In The World
• Dynamical polarization of graphene at finite doping
• Experimental observation of Weyl points
• Observation of Weyl nodes in TaAs
• Experimental realization of a topological crystalline insulator in SnTe
• Discovery of a Weyl Fermion semimetal state in NbAs
• Topological response in Weyl semimetals and the chiral anomaly
• Topological nodal line semimetals with and without spin-orbital coupling
• Catalogue of Topological Electronic Materials
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• Topological crystalline insulator states in Pb(1-x)Sn(x)Se
• Symmetry-based Indicators of Band Topology in the 230 Space Groups
• Dirac Cone Protected by Non-Symmorphic Symmetry and 3D Dirac Line Node in ZrSiS
• Towards ideal topological materials: Comprehensive database searches using symmetry indicators
• Topological nodal line semimetals
• A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Topological classification of crystalline insulators through band structure combinatorics
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Nodal-chain metals
• Topological nodal-line fermions in ZrSiSe and ZrSiTe
• Radiatively Induced Lorentz and CPT Violation in Electrodynamics
• High-throughput calculations of magnetic topological materials
• Hourglass Fermions
• Dirac vs. Weyl in topological insulators: Adler-Bell-Jackiw anomaly in transport phenomena
• Observation of Topological Nodal Fermion Semimetal Phase in ZrSiS
• Experimental Observation of Three-Component 'New Fermions' in Topological Semimetal MoP
• Observation of Weyl nodes and Fermi arcs in TaP
• Angle-resolved photoemission spectroscopy and its application to topological materials
• Structure and Topology of Band Structures in the 1651 Magnetic Space Groups
• Observation of Double Weyl Phonons in Parity-Breaking FeSi
• Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe
• Plasmon mode as a detection of the chiral anomaly in Weyl semimetals
• Anisotropic Fermi Surface and Quantum Limit Transport in High Mobility 3D Dirac Semimetal Cd3As2
• RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
• Quantized Thermoelectric Hall Effect Induces Giant Power Factor in a Topological Semimetal
• Response of strongly-interacting matter to magnetic field: some exact results
• Magnetic Excitations in Non-Collinear Antiferromagnetic Weyl Semimetal $\mathsf{M}{\mathsf{n}}_3\mathsf{Sn}$
• Spin Excitations and Spin Wave Gap in the Ferromagnetic Weyl Semimetal Co${}_3$Sn${}_2$S${}_2$
• Dynamic current-current susceptibility in 3D Dirac and Weyl semimetals
• Topological Singularity Induced Chiral Kohn Anomaly in a Weyl Semimetal
• Unusual exchange couplings and intermediate temperature Weyl state in Co3Sn2S2
• Magnetic structure and excitations of the topological semimetal YbMnBi${}_2$
• Appearance of T${}_d^{\ast }$ phase across the T${}_d$-1T${}^{\prime }$ phase boundary in Weyl semimetal MoTe${}_2$
• Signatures of coupling between spin waves and Dirac fermions in YbMnBi${}_2$
• Magnon spectrum of the Weyl semimetal half-Heusler compound GdPtBi
• Quasi-2D magnetism and origin of the Dirac semimetallic behavior in nonstoichiometric Sr${}_{1-y}$Mn${}_{1-z}$Sb${}_2$ (y, z~$<$0.1)
• Spin dynamics of a magnetic Weyl semimetal Sr${}_{1-x}$Mn${}_{1-y}$Sb${}_2$
• Neutron scattering off Weyl semimetals

Cited by in corpus (1)

• Spin-Textured Neutron Beams with Orbital Angular Momentum