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 NbIrTe4. 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 NbIrTe4 under fields all the way up to 35 T, Hall-effect measurements indicate that NbIrTe4 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.
@article{arxiv.1902.06159,
title = {Bulk Fermi surface of the type-II Weyl semimetal candidate NbIrTe$_{4}$},
author = {Rico Schönemann and Yu-Che Chiu and Wenkai Zheng and Victor Quito and Shouvik Sur and Gregory T. McCandless and Julia Y. Chan and Luis Balicas},
journal= {arXiv preprint arXiv:1902.06159},
year = {2019}
}