Fermi surface study of the Weyl type-II semimetal candidate NbIrTe<sub>4</sub>

ORAL

Abstract

Here we present a study of the Shubnikov-de Haas (SdH) effect in the type-II Weyl semimetal candidate NbIrTe4. Quantum oscillations were obtained at temperatures down to 0.3 K and in high magnetic fields up to 35 T. The angular dependence of the SdH frequencies is in good agreement with results from DFT calculations, although we are not able to detect every orbit. We observe an unusual butterfly shaped magnetoresistance as a function of the sample orientation with respect to the magnetic field, which is likely to originate from the shape and anisotropy of the Fermi surface. Furthermore, we measured a large non-saturating magnetoresistance up to fields 35 T which suggests charge carrier compensation. On the other hand Hall measurements indicate significantly different electron and hole densities, which implies that the non-saturating magnetoresistance is not driven by charge carrier compensation.

*This work was supported by DOE-BES through Award No. DE-SC0002613. The NHMFL is supported by NSF through NSF-DMR-1157490 and the State of Florida.

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Presenters

  • Rico Schoenemann

    • National High Magnetic Field Laboratory

Authors

  • Rico Schoenemann

    • National High Magnetic Field Laboratory

  • Shouvik Sur

    • Northwestern University

  • Victor Quito

    • Iowa State University

  • Yu-Che Chiu

    • National High Magnetic Field Laboratory
    • Florida State University

  • Wenkai Zheng

    • National High Magnetic Field Laboratory FSU
    • National High Magnetic Field Laboratory

  • Gregory T. McCandless

    • Department of Chemistry and Biochemistry, The University of Texas at Dallas
    • University of Texas at Dallas

  • Julia Y. Chan

    • Department of Chemistry, University of Texas at Dallas
    • University of Texas at Dallas
    • Department of Chemistry and Biochemistry, The University of Texas at Dallas

  • Luis Balicas

    • National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA.
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory FSU
    • National High Magnetic Field Lab, Florida State University, Tallahassee, USA
    • NHMFL