Chiral Quasiparticles at the Fermi Surface of the Weyl Semimetal TaAs

Abstract

Tantalum arsenide is a member of the non-centrosymmetric monopnictides, which are putative Weyl semimetals. In these materials, three-dimensional chiral massless quasiparticles, the so-called Weyl fermions, are predicted to induce novel quantum mechanical phenomena, such as the chiral anomaly and topological surface states. However, their chirality is only well-defined if the Fermi level is close enough to the Weyl points that separate Fermi surface pockets of opposite chirality exist. In this article, we present the bulk Fermi surface topology of high quality single crystals of TaAs, as determined by angle-dependent Shubnikov-de Haas and de Haas-van Alphen measurements combined with ab-initio band-structure calculations. Quantum oscillations originating from three different types of Fermi surface pocket were found in magnetization, magnetic torque, and mag- netoresistance measurements performed in magnetic fields up to 14 T and temperatures down to 1.8 K. Of these Fermi pockets, two are pairs of topologically non-trivial electron pockets around the Weyl points and one is a trivial hole pocket. Unlike the other members of the non-centrosymmetric monopnictides, TaAs is the first Weyl semimetal candidate with the Fermi energy suffciently close to both types of Weyl points to generate chiral quasiparticles at the Fermi surface.

References in corpus (1)

• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides

Cited by in corpus (59)

• Weyl and Dirac Semimetals in Three Dimensional Solids
• Topological Materials: Weyl Semimetals
• Electronic Transport and quantum oscillation of Topological Semimetals
• The Berry curvature dipole in Weyl semimetal materials: an ab initio study
• Quantum Transport in Topological Semimetals under Magnetic Fields
• First Principles Calculations for Topological Quantum Materials
• Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
• Quantum limit transport and destruction of the Weyl nodes in TaAs
• Observation of giant spin-split Fermi-arc with maximal Chern number in the chiral topological semimetal PtGa
• Mesoscopic superconductivity and high spin polarization coexisting at metallic point contacts on the Weyl semimetal TaAs
• Semilocal exchange-correlation potentials for solid-state calculations: Current status and future directions
• Nonlinear Hall effect in Weyl semimetals induced by chiral anomaly
• Large contribution of Fermi arcs to the conductivity of topological metals
• Quantum Transport in Topological Semimetals under Magnetic Fields (II)
• Tunable surface plasmons in Weyl semimetals TaAs and NbAs
• Resonant X-ray scattering study of diffuse magnetic scattering from the topological semimetals EuCd${}_2$As${}_2$ and EuCd${}_2$Sb${}_2$
• Optical evidence of the chiral magnetic anomaly in Weyl semimetal TaAs
• Chiral sound waves in strained Weyl semimetals
• Non-saturating Quantum Magnetization in Weyl semimetal TaAs
• Giant magnetic quantum oscillations in the thermal conductivity of TaAs: Indications of chiral zero sound
• Optical Control of Chiral Charge Pumping in a Topological Weyl Semimetal
• Orbital effect and weak localization physics in the longitudinal magnetoresistance of the Weyl semimetals NbP, NbAs, TaP and TaAs
• The thickness dependence of quantum oscillations in ferromagnetic Weyl metal SrRuO${}_3$
• Planar Hall-effect, Anomalous planar Hall-effect, and Magnetic Field-Induced Phase Transitions in TaAs
• Topological frequency conversion in Weyl semimetals
• Transport signatures of surface states in a Weyl semimetal: evidence of field driven Fermi arc interferometry
• Magnetic susceptibility of topological semimetals
• Magneto-optical Kerr effect in Weyl semimetals with broken inversion and time-reversal symmetries
• Landau levels with magnetic tunnelling in Weyl semimetal and magnetoconductance of ballistic $p$-$n$ junction
• Complete optical valley polarization in Weyl semimetals in strong magnetic fields
• Low-frequency Quantum Oscillations from Interactions in Layered Metals
• Anomalous sound attenuation in Weyl semimetals in magnetic and pseudomagnetic fields
• Field-angle dependence of sound velocity in the Weyl semimetal TaAs
• High-throughput screening of Weyl semimetals
• Addressing Shape and Extent of Weyl cones in TaAs by Landau level spectroscopy
• Magnetotransport properties of the new-type topological semimetal ZrTe
• Anomalous Electromagnetic Field Penetration in a Weyl or Dirac Semimetal
• Superconductivity from piezoelectric interactions in Weyl semimetals
• High-order harmonic generations in tilted Weyl semimetals
• Weyl nodes close to the Fermi energy in NbAs
• Detection of relativistic fermions in Weyl semimetal TaAs by magnetostriction measurements
• Topological transitions to Weyl states in bulk Bi${}_2$Se${}_3$: Effect of hydrostatic pressure and doping
• Analysis of Dirac and Weyl points in topological semimetals via oscillation effects
• Anomalous Gurzhi effect
• Nanoscale devices with superconducting electrodes to locally channel current in 3D Weyl semimetals
• Quantum Oscillation Signatures of Fermi Arcs in Tunnel Magnetoconductance
• Detect Axial Gauge Fields with a Calorimeter
• Electron scattering by magnetic impurity in Weyl semimetals
• Electric and chiral response to a pseudoelectric field in Weyl materials
• Emergent Weyl Fermions in an Orbital Multipolar Ordering Phase
• Comparative ${}^{181}$Ta-NQR Study of Weyl Monopnictides TaAs and TaP: Relevance of Weyl Fermion Excitations
• Quantum magnetic oscillations in Weyl semimetals with tilted nodes
• Phase of quantum oscillation in Weyl semimetals
• 2D Weyl Fermi gas model of Superconductivity in the Surface state of a Topological Insulator at High Magnetic fields
• Surface and bulk superconductivity at ambient pressure in the Weyl semimetal TaP
• Isotropic Dirac fermion and anomalous oscillator strength of zeroth Landau level transition
• Observation of Quadratic (Charge-2) Weyl Point Splitting in Near-Infrared Photonic Crystals
• Surface states and finite size effects in triple-fold semimetals
• Model for charge carrier spectra in topological semimetals of the TaAs family