Topological Properties of Superconducting PdTe

ORAL

Abstract

PdTe is a superconductor with Tc ~ 4.5 K. We have investigated its normal-state electronic properties via both first principles calculations and magnetic torque measurements by applying magnetic field up to 35 Tesla. Detailed analysis of the de-Haas van Alphen (dHvA) oscillations allows us to identify four frequencies: Fα = 64 T, Fβ = 658 T, Fγ = 1155 T, and Fη = 1867 T. Using the Lifshitz-Kosevich equation to fit the experimental data, the effective masses are obtained with m*α = 0.305m0, m*β = 0.288m0, m*γ = 0.415m0, and m*η = 0.451m0 (m0 is the free electron mass). By constructing the Landau fan diagram for each band, we extract the Berry phase, which is non-trivial for the α and γ bands. These experimental findings are consistent with the calculated results. This suggests that PdTe is a topological superconductor.

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Presenters

  • Ramakanta Chapai

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

Authors

  • Ramakanta Chapai

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

  • Peram Sreenivasa Reddy

    • National Cheng Kung University, Taiwan

  • Lingyi Xing

    • Louisiana State University, Baton Rouge

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory, Florida State University
    • Department of Physics, National High Magnetic Field Laboratory, Florida State University, Florida, USA
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Florida State University
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • Florida State Univ
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Lab, Tallahassee, FL 32310, USA
    • National High Magnetic Field Laboratory, 1800 E. Paul Dirac Drive, Tallahassee, FL 32310, USA
    • National High Magnetic Field Laboratory-Florida State University
    • National High Magnetic Field Laboratory, Tallahassee, FL
    • NHMFL, Florida State University
    • NHMFL

  • Amar B. Karki

    • Louisiana State University, Baton Rouge

  • Weiwei Xie

    • Chemistry, Louisiana State University
    • Louisiana State University
    • Department of Chemistry, Louisiana State University
    • Louisiana State University, Baton Rouge

  • John Ditusa

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

  • Tay-Rong Chang

    • National Cheng Kung University
    • Physics, National Cheng Kung University
    • Department of Physics, National Cheng Kung University
    • National Cheng Kung University, Taiwan

  • 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