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

作者：黄祥威; 刘晓雄; 于鹏; 李沛岭; 崔健; 易剑; 邓剑波; 樊洁; 姬忠庆; 屈凡明; 景秀年; 杨昌黎; 吕力; 刘政^*; 刘广同^*

来源：Chinese Physics Letters, 2019, 36(07): 81-85.

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.