Kramers nodal lines and Weyl fermions in SmAlSi

Abstract

Kramers nodal lines (KNLs) have recently been proposed theoretically as a special type of Weyl line degeneracy connecting time-reversal invariant momenta. KNLs are robust to spin orbit coupling and are inherent to all non-centrosymmetric achiral crystal structures, leading to unusual spin, magneto-electric, and optical properties. However, their existence in in real quantum materials has not been experimentally established. Here we gather the experimental evidence pointing at the presence of KNLs in SmAlSi, a non-centrosymmetric metal that develops incommensurate spin density wave order at low temperature. Using angle-resolved photoemission spectroscopy, density functional theory calculations, and magneto-transport methods, we provide evidence suggesting the presence of KNLs, together with observing Weyl fermions under the broken inversion symmetry in the paramagnetic phase of SmAlSi. We discuss the nesting possibilities regarding the emergent magnetic orders in SmAlSi. Our results provide a solid basis of experimental observations for exploring correlated topology in SmAlSi.

arXiv comment40 pages, 5 figures, 1 table

References in corpus (41)

• Topological Insulators
• Topological insulators and superconductors
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Classification of topological quantum matter with symmetries
• Wannier90 as a community code: new features and applications
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Topological nodal line semimetals
• Fermi surface nesting and the origin of Charge Density Waves in metals
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Nodal-chain metals
• Topological quantum properties of chiral crystals
• Multiple types of topological fermions in transition metal silicides
• Double Dirac Semimetals in Three Dimensions
• Nodal surface semimetals: Theory and material realization
• Theoretical prediction of magnetic and noncentrosymmetric Weyl fermion semimetal states in the R-Al-X family of compounds (R=rare earth, Al=aluminium, X=Si, Ge)
• Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
• Skyrmion Crystal from RKKY Interaction Mediated by 2D Electron Gas
• Topological nodal Cooper pairing in doped Weyl metals
• Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
• A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
• The study of magnetic topological semimetals by first principles calculations
• Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
• Symmetry-enforced topological nodal planes at the Fermi surface of a chiral magnet
• Electronic structure and nesting-driven enhancement of the RKKY interaction at the magnetic ordering propagation vector in Gd2PdSi3 and Tb2PdSi3
• Topological spiral magnetism in the Weyl semimetal SmAlSi
• Kramers Nodal Line Metals
• Evidence of Nodal Line in the Superconducting Gap Symmetry of Noncentrosymmetric ThCoC${}_2$
• Symmetry-enforced band crossings in tetragonal materials: Dirac and Weyl degeneracies on points, lines, and planes
• Observation of Fermi arcs and Weyl nodes in a non-centrosymmetric magnetic Weyl semimetal
• Kramers Weyl Semimetals as Quantum Solenoids and Their Applications in Spin-Orbit Torque Devices
• Spin-triplet superconductivity in Weyl nodal-line semimetals
• Mapping Domain Wall Topology in the Magnetic Weyl Semimetal CeAlSi
• Tuning the nontrivial topological properties of the Weyl semimetal CeAlSi
• Topological features in the ferromagnetic Weyl semimetal CeAlSi: Role of domain walls
• The dynamics of local magnetic moments induced by itinerant Weyl electrons
• Quantum oscillations in the non-centrosymmetric superconductor and topological nodal-line semimetal PbTaSe${}_2$
• Recent advancements in the study of intrinsic magnetic topological insulators and magnetic Weyl semimetals
• Quantum oscillations in Noncentrosymmetric Weyl semimetals RAlSi (R = Sm and Ce)
• Signature of weakly coupled $f$ electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi
• Linking structures of doubly charged nodal surfaces in centrosymmetric superconductors
• RKKY interaction of magnetic impurities in node-line semimetals

Cited by in corpus (15)

• Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal
• Nonlinear optical diode effect in a magnetic Weyl semimetal
• Metamagnetism and anomalous magnetotransport properties in rare-earth-based polar semimetals $R$AuGe ($R=$ Dy, Ho, and Gd)
• Kramers nodal lines in intercalated TaS${}_2$ superconductors
• Observation of mirror-odd and mirror-even spin texture in ultrathin epitaxially strained RuO2 films
• Non-Hermitian Boundary in a Surface Selective Reconstructed Magnetic Weyl Semimetal
• Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution
• Tunable Octdong and Spindle-Torus Fermi Surfaces in Kramers Nodal Line Metals
• Spin order and dynamics in the topological rare-earth germanide semimetals
• Anomalous Hall effect in the antiferromagnetic Weyl semimetal SmAlSi
• Topological Fermi-arc-like surface states in Kramers nodal line metals
• Zone-selection effect of photoelectron intensity distributions in a nonsymmorphic system RAlSi (R : Ce and Nd)
• Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal
• Fermi surface and Berry phase analysis for Dirac nodal line semimetals: cautionary tale to SrGa${}_2$ and BaGa${}_2$
• Kramers nodal line in the charge density wave state of YTe${}_3$ and the influence of twin domains