Electronic structure in a transition metal dipnictide TaAs2

Abstract

The family of transition metal dipnictides (TMDs) has been of theoretical and experimental interest because this family hosts topological states and extremely large magnetoresistance (MR). Recently, TaAs2, a member of this family, has been predicted to support a topological crystalline insulating state. Here, by using high resolution. Angle resolved photoemission spectroscopy (ARPES), we reveal both closed and open pockets in the metallic Fermi surface and linearly dispersive bands on the (201) surface, along with the presence of extreme MR observed from magneto-transport measurements. A comparison of the ARPES results with first-principles computations show that the linearly dispersive bands on the measured surface of TaAs2 are trivial bulk bands. The absence of symmetry-protected surface state on the (201) surface indicates its topologically dark nature. The presence of open Fermi surface features suggests that the open orbit fermiology could contribute to the extremely large MR of TaAs.

arXiv comment13 pages, 5 figures

References in corpus (45)

• Topological Insulators
• Topological insulators and superconductors
• Topological Insulators in Three Dimensions
• Topological Insulators with Inversion Symmetry
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• WannierTools: An open-source software package for novel topological materials
• Topological Crystalline Insulators
• Titanic Magnetoresistance in WTe2
• Colloquium: Topological Band Theory
• Topological Crystalline Insulators in the SnTe Material Class
• Experimental realization of a topological crystalline insulator in SnTe
• A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry
• Consequences of breaking time reversal symmetry in LaSb: a resistivity plateau and extreme magnetoresistance
• Gate-Tunable Negative Longitudinal Magnetoresistance in the Predicted Type-II Weyl Semimetal WTe2
• Extremely high magnetoresistance and conductivity in the type-II Weyl semimetals WP2 and MoP2
• Robust Type-II Weyl Semimetal Phase in Transition Metal Diphosphides XP${}_2$ (X = Mo, W)
• Anisotropic giant magnetoresistance in NbSb2
• Magnetic Field Effects on Transport Properties of PtSn4
• Discovery of switchable weak topological insulator state in quasi-one-dimensional bismuth iodide
• Compensated semimetal LaSb with unsaturated magnetoresistance
• 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
• Optical Signatures of Dirac Nodal-lines in NbAs${}_2$
• 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)
• Purely rotational symmetry-protected topological crystalline insulator $\alpha$-Bi4Br4
• Hidden Weyl Points in Centrosymmetric Paramagnetic Metals
• Extreme magnetoresistance induced by Zeeman effect-driven electron-hole compensation and topological protection in MoSi${}_2$
• Extremely large magnetoresistance from electron-hole compensation in the nodal loop semimetal ZrP${}_2$
• Topological crystalline insulator states in the Ca${}_2$As family
• Observation of Open-Orbit Fermi Surface Topology in Extremely Large Magnetoresistance Semimetal MoAs${}_2$
• Huge linear magnetoresistance due to open orbits in $\gamma$-PtBi${}_2$
• Magnetoresistance and robust resistivity plateau in MoAs2
• Probing the Fermi surface and magnetotransport properties in MoAs${}_2$
• Electronic properties of TaAs2 topological semimetal investigated by transport and ARPES
• Observation of gapped state in rare-earth monopnictide HoSb
• Topological crystalline insulator state with type-II Dirac fermions in transition metal dipnictides
• Termination Dependent Topological Surface States in Nodal Loop Semimetal HfP2
• Magnetoresistance and Kondo effect in the nodal-line semimetal VAs${}_2$
• Electronic structure and open-orbit Fermi surface topology in isostructural semimetals NbAs${}_2$ and W${}_2$As${}_3$ with extremely large magnetoresistance
• Dirac state switching in transition metal diarsenides

Cited by in corpus (1)

• Surface photoelectric effect by twisted photons as a source of twisted electrons