Hidden Weyl Points in Centrosymmetric Paramagnetic Metals

Abstract

The transition metal dipnictides TaAs2 , TaSb2 , NbAs2 and NbSb2 have recently sparked interest for exhibiting giant magnetoresistance. While the exact nature of magnetoresistance in these materials is still under active investigation, there are experimental results indicating anisotropic negative magnetoresistance. We study the effect of magnetic field on the band structure topology of these materials by applying a Zeeman splitting. In the absence of magnetic field, we find that the materials are weak topological insulators, which is in agreement with previous studies. When the magnetic field is applied, we find that type-II Weyl points form. This result is found first from a symmetry argument, and then numerically for a k.p model of TaAs2 and a tight-binding model of NbSb2. This effect can be of help in search for an explanation of the anomalous magnetoresistance in these materials.

References in corpus (13)

• Type-II Weyl Semimetals
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
• MoTe2: A Type-II Weyl Topological Metal
• Robust Type-II Weyl Semimetal Phase in Transition Metal Diphosphides XP${}_2$ (X = Mo, W)
• Anisotropic giant magnetoresistance in NbSb2
• Large Magnetoresistance in Compensated Semimetals TaAs${}_2$ and NbAs${}_2$
• Resistivity plateau and extremely large magnetoresistance in NbAs2 and TaAs2
• Field-induced resistivity plateau and unsaturated negative magnetoresistance in topological semimetal TaSb2
• Fermi surface topology and negative longitudinal magnetoresistance observed in centrosymmetric NbAs2 semimetal
• Anomalous electronic structure and magnetoresistance in TaAs${}_2$
• Giant semiclassical magnetoresistance in high mobility TaAs2 semimetal
• Electronic structures of transition metal dipnictides $XP{n}_2$ ($X$=Ta, Nb; $Pn$=P, As, Sb)

Cited by in corpus (24)

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• Superconductivity in Type-II Weyl Semimetals
• Exploring Topological Superconductivity in Topological Materials
• Breakdown of the Chiral Anomaly in Weyl Semimetals in a Strong Magnetic Field
• Extremely large magnetoresistance from electron-hole compensation in the nodal loop semimetal ZrP${}_2$
• Pressure-induced superconductivity in topological semimetal NbAs2
• Electronic properties of TaAs2 topological semimetal investigated by transport and ARPES
• Zeeman-splitting-induced Topological Nodal Structure and Anomalous Hall Conductivity in ZrTe${}_5$
• VASP2KP: kp models and Lande g-factors from ab initio calculations
• Topological crystalline insulator state with type-II Dirac fermions in transition metal dipnictides
• Quantum transport in a compensated semimetal W2As3 with nontrivial Z2 indices
• Quantum oscillations and nontrivial topological state in a compensated semimetal TaP2
• A $k\cdot p$ effective Hamiltonian generator
• The Emerging Weak Antilocalization Effect in Semimetal Ta${}_{0.7}$Nb${}_{0.3}$Sb${}_2$ Single Crystal
• Influences of spin-orbit coupling on Fermi surfaces and Dirac cones in ferroelectric-like polar metals
• Spin-lattice relaxation phenomena in the magnetic state of a suggested Weyl semimetal CeAlGe
• Temperature driven spin-zero effect in TaAs${}_2$
• Experimental nuclear quadrupole resonance and computational study of the structurally refined topological semimetal TaSb${}_2$
• Intertwined topological phases in TaAs2 nanowires with giant magnetoresistance and quantum coherent surface transport
• Electronic structure in a transition metal dipnictide TaAs2
• Symmetry-enforced Fermi degeneracy in topological semimetal RhSb${}_3$
• Origin of the tiny energy gap and Dirac points in monoclinic trilayer nickelate La${}_4$Ni${}_3$O${}_{10}$
• Topological Lifshitz transition in Weyl semimetal NbP decorated with heavy elements