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Magneto-Transport and Shubnikov–de Haas Oscillations in the Type-II Weyl Semimetal Candidate NbIrTe4 Flake

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Funds: Supported by the National Basic Research Program of China under Grant Nos 2015CB921101 and 2016YFA0300600, the National Natural Science Foundation of China under Grant No 11874406, the Singapore National Research Foundation under Grant No NRF-NRFF2013-08, the Tier 2 MOE2016-T2-2-153, and the A*Star QTE Programme.
  • Received Date: May 12, 2019
  • Published Date: June 30, 2019
  • We report on magnetoresistance, Hall effect, and quantum Shubnikov–de Haas oscillation (SdH) experiments in NbIrTe4 single crystals, which was recently predicted to be a type-II Weyl semimetal. NbIrTe4 manifests a non-saturating and parabolic magnetoresistance at low temperatures. The magneto-transport measurements show that NbIrTe4 is a multiband system. The analysis of the SdH oscillations reveals four distinct oscillation frequencies. Combined with the density-functional theory calculations, we show that they come from two types of Fermi surfaces: electron pocket E1 and hole pocket H2.
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