Impurity screening and stability of Fermi arcs against Coulomband magnetic scattering in a Weyl monopnictide

Abstract

We present a quasiparticle interference study of clean and Mn surface-doped TaAs, a prototypical Weyl semimetal, to test the screening properties as well as the stability of Fermi arcs against Coulomb and magnetic scattering. Contrary to topological insulators, the impurities are effectively screened in Weyl semimetals. The adatoms significantly enhance the strength of the signal such that theoretical predictions on the potential impact of Fermi arcs can be unambiguously scrutinized. Our analysis reveals the existence of three extremely short, previously unknown scattering vectors. Comparison with theory traces them back to scattering events between large parallel segments of spin-split trivial states, strongly limiting their coherence. In sharp contrast to previous work [R. Batabyal et al., Sci. Adv. 2, e1600709 (2016)], where similar but weaker subtle modulations were interpreted as evidence of quasiparticle interference originating from Femi arcs, we can safely exclude this being the case. Overall, our results indicate that intra- as well as inter-Fermi arc scattering are strongly suppressed and may explain why-in spite of their complex multiband structure-transport measurements show signatures of topological states in Weyl monopnictides.

References in corpus (27)

• Topological Insulators
• Topological insulators and superconductors
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Experimental discovery of Weyl semimetal TaAs
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Observation of Weyl nodes in TaAs
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Discovery of a Weyl Fermion semimetal state in NbAs
• Experimental demonstration of the topological surface states protected by the time-reversal symmetry
• Quantum Oscillations from Surface Fermi-Arcs in Weyl and Dirac Semi-Metals
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Transport evidence for Fermi-arc mediated chirality transfer in the Dirac semimetal Cd${}_3$As${}_2$
• Impurity-induced states on the surface of 3D topological insulators
• Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP
• Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal
• Atomic Scale Visualization of Quantum Interference on a Weyl Semimetal Surface by Scanning Tunneling Microscopy/Spectroscopy
• Visualizing "Fermi arcs" in the Weyl semimetal TaAs
• Mapping the unconventional orbital texture in topological crystalline insulators
• Signatures of Dirac fermion-mediated magnetic order
• Dual nature of magnetic dopants and competing trends in topological insulators
• Quasi-particle interferences of the Weyl semimetals TaAs and NbP
• Universal signatures of Fermi arcs in quasiparticle interference on the surface of Weyl semimetals
• Signatures of Weyl semimetals in quasiparticle interference
• Mesoscopic electron focusing in topological insulators

Cited by in corpus (14)

• Probing topological quantum matter with scanning tunnelling microscopy
• Dissolution of topological Fermi arcs in a dirty Weyl semimetal
• Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review
• Towards Weyltronics: Realization of epitaxial NbP and TaP Weyl Semimetal thin films
• Quasiparticle Interference of Surface States in Type-II Weyl Semimetal WTe${}_2$
• Mirror protected Dirac fermions on a Weyl semimetal NbP surface
• Topological Semimetals for Scaled Back-End-Of-Line Interconnect Beyond Cu
• Universal response of the type-II Weyl semimetals phase diagram
• Prediction of Spin Polarized Fermi Arcs in Quasiparticle Interference of CeBi
• A Systematic Investigation of the Coupling between One-Dimensional Edge States of a Topological Crystalline Insulator
• Towards diluted magnetism in TaAs
• Quasiparticle interference and resonant states in normal and superconducting line nodal semimetals
• Disorder Driven Non-Anderson Transition in a Weyl Semimetal
• Mesoscale variations of chemical and electronic landscape on the surface of Weyl semimetal Co${}_3$Sn${}_2$S${}_2$ visualized by ARPES and XPS