Fermi surface studies of type-II Dirac semimetal candidate NiTe<sub>2</sub> using de Haas-van Alphen oscillations

ORAL

Abstract

We have investigated the Fermi surface of the type-II Dirac semimetal candidate NiTe2 using torque magnetometry. The torque signal measured under applied fields of 35 T and temperatures down to 0.32 K shows clear de Haas-van Alphen (dHvA) oscillations. The oscillations are well-defined and consist of two major frequencies F1 ~ 100 T and F2 ~ 400 T. To investigate the properties of the Fermi surface, we have carried out measurements of angular and temperature dependence of the dHvA oscillations. Both frequencies vary while increasing the angle between the sample surface and the magnetic field. Also, the amplitude of the oscillations decreases at higher temperatures. We have analyzed the temperature-dependent dHvA data using the Lifshitz-Kosevich theory and calculated several physical parameters characterizing the Fermi surface.

*Work at the West Texas A&M University is supported by the Killgore Faculty Research program, the KRC Undergraduate Student Research Grant, and the Welch Foundation (Grant No. AE-0025); L.H. acknowledges the Department of Science and Technology (DST), India [Grant No. SR/WOS-A/PM-33/2018 (G)]; work at the National High Magnetic Field Laboratory was supported by NSF/DMR-1644779 and the State of Florida; B.K.P. and D.P. were supported by NSF/DMR-1707785.

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Presenters

  • Thinh Nguyen

    • West Texas A&M University

Authors

  • Thinh Nguyen

    • West Texas A&M University

  • Luminita Harnagea

    • Indian Institute of Science Education and Research
    • Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra, 411008, India

  • Duncan Miertschin

    • Department of Chemistry and Physics, West Texas A&M University, Canyon, Texas, 79016, USA

  • Bal K Pokharel

    • Department of Physics, Florida State University, Tallahassee, FL, 32306, USA. National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA

  • Dragana Popovic

    • Florida State University
    • Dept. of Phys. & Natl. High Magnetic Field Lab., Florida State Univ.

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory
    • NHMFL, Florida State University
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University

  • Keshav Shrestha

    • West Texas A&M University