Bulk Fermi surface of the type-II Weyl semimetal candidate NbIrTe${}_4$

Abstract

Recently, a new group of layered transition-metal tetra-chalcogenides were proposed, via first principles calculations, to correspond to a new family of Weyl type-II semimetals with promising topological properties in the bulk as well as in the monolayer limit. In this article, we present measurements of the Shubnikov-de Haas (SdH) and de Haas-van Alphen effects under high magnetic fields for the type-II Weyl semimetallic candidate NbIrTe${}_4$. We find that the angular dependence of the observed Fermi surface extremal cross-sectional areas agree well with our DFT calculations supporting the existence of Weyl type-II points in this material. Although we observe a large and non-saturating magnetoresistivity in NbIrTe${}_4$ under fields all the way up to 35 T, Hall-effect measurements indicate that NbIrTe${}_4$ is not a compensated semimetal. The transverse magnetoresistivity displays a four-fold angular dependence akin to the so-called butterfly magnetoresistivity observed in nodal line semimetals. However, we conclude that its field and this unconventional angular-dependence are governed by the topography of the Fermi-surface and the resulting anisotropy in effective masses and in carrier mobilities.

arXiv comment8 pages, 6 figures

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Cited by in corpus (7)

• Nonsaturating magnetoresistance and nontrivial band topology of type-II Weyl semimetal NbIrTe4
• Topological Dirac states in a layered telluride TaPdTe${}_5$ with quasi-one-dimensional PdTe${}_2$ chains
• Magnetic-field-induced nontrivial electronic state in the Kondo-lattice semimetal CeSb
• Anisotropic transport and de Haas$-$van Alphen oscillations in quasi-one-dimensional TaPtTe${}_5$
• Layered van der Waals topological metals of TaTMTe4 (TM = Ir, Rh, Ru) family
• Single Crystal Growth and Transport Properties of van der Waals Materials $AB$Te${}_4$ ($A/B$ = Ti, Zr, Hf)
• Observation of nearly identical superconducting transition temperatures in pressurized Weyl semimetal MIrTe4 (M=Nb and Ta)