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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