Evidence for Weyl fermions in a canonical heavy-fermion semimetal YbPtBi

Abstract

The manifestation of Weyl fermions in strongly correlated electron systems is of particular interest. We report evidence for Weyl fermions in the heavy fermion semimetal YbPtBi from electronic structure calculations, angle-resolved photoemission spectroscopy, magnetotransport and calorimetric measurements. At elevated temperatures where $4f$-electrons are localized, there are triply degenerate points, yielding Weyl nodes in applied magnetic fields. These are revealed by a contribution from the chiral anomaly in the magnetotransport, which at low temperatures becomes negligible due to the influence of electronic correlations. Instead, Weyl fermions are inferred from the topological Hall effect, which provides evidence for a Berry curvature, and a cubic temperature dependence of the specific heat, as expected from the linear dispersion near the Weyl nodes. The results suggest that YbPtBi is a Weyl heavy fermion semimetal, where the Kondo interaction renormalizes the bands hosting Weyl points. These findings open up an opportunity to explore the interplay between topology and strong electronic correlations.

arXiv comment19 pages, 5 figures, Supplementary Information available with open access at https://www.nature.com/articles/s41467-018-06782-1

References in corpus (31)

• Topological insulators and superconductors
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl Semimetal in a Topological Insulator Multilayer
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Dirac semimetal in three dimensions
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Observation of the chiral magnetic effect in ZrTe5
• Tunable Multifunctional Topological Insulators in Ternary Heusler Compounds
• Topological Kondo Insulators
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• Experimental Observation of Three-Component 'New Fermions' in Topological Semimetal MoP
• Low-temperature surface conduction in the Kondo insulator SmB${}_6$
• Heusler, Weyl, and Berry
• Robust formation of skyrmions and topological Hall effect in epitaxial thin films of MnSi
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Planar Hall effect in the Weyl semimetal GdPtBi
• Experimental tests of the chiral anomaly magnetoresistance in the Dirac-Weyl semimetals Na${}_3$Bi and GdPtBi
• On the search for the chiral anomaly in Weyl semimetals: The negative longitudinal magnetoresistance
• Weyl-Kondo Semimetal in Heavy Fermion Systems
• Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
• Possible Weyl fermions in the magnetic Kondo system CeSb
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2
• Single-ion Kondo Scaling of the Coherent Fermi Liquid Regime in Ce1-xLaxNi2Ge2
• Momentum-space and real-space Berry curvatures in Mn${}_3$Sn
• Parity-violating hybridization in heavy Weyl semimetals
• Two-channel conduction in YbPtBi

Cited by in corpus (42)

• Weyl-Kondo Semimetal in Heavy Fermion Systems
• A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
• Anomalous Hall resistivity and possible topological Hall effect in the EuAl${}_4$ antiferromagnet
• Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd${}_2$As${}_2$
• Nonsaturating magnetoresistance, anomalous Hall effect, and magnetic quantum oscillations in ferromagnetic semimetal PrAlSi
• Signatures for half-metallicity and nontrivial surface states in a Kagome-lattice magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1-x films
• Topological Hall effect in the antiferromagnetic Dirac semimetal EuAgAs
• Weyl-Kondo semimetals in nonsymmorphic systems
• Rare regions and avoided quantum criticality in disordered Weyl semimetals and superconductors
• Intrinsic negative magnetoresistance from the chiral anomaly of multifold fermions
• Anomalous Hall effect and negative longitudinal magnetoresistance in half-Heusler topological semimetal candidates TbPtBi and HoPtBi
• Consecutive topological phase transitions and colossal magnetoresistance in a magnetic topological semimetal
• From Trivial Kondo Insulator Ce${}_3$Pt${}_3$Bi${}_4$ to Topological Nodal-line Semimetal Ce${}_3$Pd${}_3$Bi${}_4$
• Negative longitudinal magnetoresistance as a sign of a possible chiral magnetic anomaly in the half-Heusler antiferromagnet DyPdBi
• Tuning the Parity Mixing of Singlet-Septet Pairing in a Half-Heusler Superconductor
• Giant magnetoresistance and topological Hall effect in the EuGa4 antiferromagnet
• Experimental and theoretical study of the correlated compound YbCdSn: Evidence for large magnetoresistance and mass enhancement
• Magnetotransport signatures of chiral magnetic anomaly in the half-Heusler phase ScPtBi
• Tuning the topological character of half-Heusler systems: A comparative study on Y$T$Bi ($T$ = Pd, Pt)
• Large Fermi Surface Expansion through Anisotropic c-f Mixing in the Semimetallic Kondo Lattice System CeBi
• Effects of strong correlations on the nonlinear response in Weyl-Kondo semimetals
• Spin-lattice relaxation phenomena in the magnetic state of a suggested Weyl semimetal CeAlGe
• Berry curvature derived negative magnetoconductivity observed in type-II magnetic Weyl semimetal films
• Extremely large magnetoresistance and compensated Fermi surfaces in the antiferromagnetic semimetal YbAs
• Weyl-Kondo Semimetal: Towards Control of Weyl Nodes
• How to identify and characterize strongly correlated topological semimetals
• Insulating Half-Heusler TmPdSb with Unusual Band Order and Metallic Surface States
• Neutron scattering off Weyl semimetals
• Ultrafast photoinduced phase transition in the antiferromagnetic Dirac semimetal EuAgAs
• Tuning of anomalous magnetotransport properties in half-Heusler topological semimetal GdPtBi
• Quantum Hall Effect in a Weyl-Hubbard Model: Interplay between Topology and Correlation
• Rich unconventional Hall effects in a single quasi-kagome Kondo Weyl semimetal candidate Ce${}_3$TiSb${}_5$
• Surface excitations relaxation in the Kondo insulator Sm${}_{1-x}$Gd${}_x$B${}_6$
• Exchange gap in GdPtBi probed by magneto-optics
• Connecting the avoided quantum critical point to the magic-angle transition in three-dimensional Weyl semimetals
• Non-Ohmic negative longitudinal magnetoresistance in two-dimensional electron gas
• Transverse and Longitudinal Magnetothermopower Promoted by Ambipolar Effect in Half-Heusler Topological Materials
• Carrier-density dependence of magnetotransport in correlated Dirac semimetal CaIrO${}_3$
• Magnetic and electrical transport properties of the single-crystalline half-Heusler antiferromagnet DyNiSb
• Twinning in ferromagnetic Heusler Rh2MnSb epitaxial thin films
• Thermodynamic and electrical transport properties of the half-Heusler plumbide TbAuPb