Magnetotransport properties of Dirac semimetal TaSe<sub>3</sub>

ORAL

Abstract

We have investigated the magnetotransport properties of the transition metal trichalcogenide TaSe3, which is a Dirac semimetal candidate. While the electrical resistivity exhibits metallic behavior at zero field, a magnetic field (H)-induced upturn is observed at low temperatures for H > 4 T, applied perpendicular to the current direction. The extremely large, non-saturating transverse magnetoresistance (MR) reaches ~ 7000 % for H = 14 T at 1.9 K. For H > 6 T, Shubnikov-de Haas (SdH) oscillations are observed with frequencies Fα ≈ 98 T and Fβ ≈ 186 T. By constructing the Landau fan diagram for each oscillation, we calculated the Berry phase to be 1.1 π and 0.2 π for Fα and Fβ , respectively . The underlying physics will be discussed.

*This work is supported by the U. S. Department of Energy under EPSCoR grant no DE-SC0012432 with additional support from the Louisiana Board of Regents.

–

Presenters

  • Ahmad Ikhwan Us Saleheen

    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Louisiana State University, Baton Rouge

Authors

  • Ahmad Ikhwan Us Saleheen

    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Louisiana State University, Baton Rouge

  • Ramakanta Chapai

    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Physics, Louisiana State University
    • Louisiana State University, Baton Rouge

  • Lingyi Xing

    • Louisiana State University, Baton Rouge

  • Dongliang Gong

    • Louisiana State University, Baton Rouge
    • Louisiana State University, Baton Rouge, LA 70803 USA

  • Roshan Nepal

    • Louisiana State University, Baton Rouge

  • David P Young

    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge
    • Louisiana State University, Baton Rouge
    • Physics, Louisiana State University

  • Rongying Jin

    • Louisiana State University, Baton Rouge
    • Department of Physics & Astronomy, Louisiana State University
    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Physics, Louisiana State University
    • Louisiana State University