Signature of chiral fermion instability in the Weyl semimetal TaAs above the quantum limit

Abstract

We report the electrical transport properties for Weyl semimetal TaAs in an intense magnetic field. Series of anomalies occur in the longitudinal magnetoresistance and Hall signals at ultra-low temperatures when the Weyl electrons are confined into the lowest Landau level. These strongly temperature-dependent anomalies are ascribed to the electron-hole pairing instability. Our measurements show that the Weyl semimetal TaAs in the ultraquantum regime provides a good platform for studying electron-electron interaction in topological nontrivial semimetals.

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Cited by in corpus (13)

• Discovery of Log-Periodic Oscillations in Ultra-Quantum Topological Materials
• Crystal growth and quantum oscillations in the topological chiral semimetal CoSi
• Quantum Oscillations of The Positive Longitudinal Magnetoconductivity: a Fingerprint for Identifying Weyl Semimetals
• Electron Transport in Dirac and Weyl Semimetals
• Quantum oscillations in the non-centrosymmetric superconductor and topological nodal-line semimetal PbTaSe${}_2$
• Towards the manipulation of topological states of matter: A perspective from electron transport
• Optical evidence of the chiral magnetic anomaly in Weyl semimetal TaAs
• Theory of transport property of density wave phases in three-dimensional metals and semimetals under high magnetic field
• Planar Hall-effect, Anomalous planar Hall-effect, and Magnetic Field-Induced Phase Transitions in TaAs
• Strong anisotropy of electron-phonon interaction in NbP probed by magnetoacoustic quantum oscillations
• Quantum oscillations of the nonlinear planar effects signifying chiral anomaly in Weyl Semimetals
• Theory of phonon instabilities in Weyl semimetals at high magnetic fields
• Influence of anisotropy, tilt and pairing of Weyl nodes: The Weyl semimetals TaAs, TaP, NbAs and NbP