Observation of Quantum Oscillations in PdTe<sub>2</sub> Single Crystals

ORAL

Abstract

Transition-metal dichalcogenide PdTe2 exhibits superconductivity and topologically non-trivial surface states. Here, we present a detailed study of the de-Haas van Alphen (dHvA) oscillations in single crystalline PdTe2. In analyzing the magnetic field dependence of the magnetization and magnetic torque, we identify two frequencies from the oscillations: Fα = 8 T and Fβ = 117 T. Using the Lifshitz-Kosevich equation to fit experimental data, the effective masses are obtained with m*α = 0.059m0 and m*β = 0.067m0 (m0 is the free electron mass). Further analysis of the dHvA oscillations reveals that the α band possesses a non-trivial Berry phase (~ 0.94π) while the β band consists of a smaller Berry phase (~ 0.32π). This indicates that the α band is likely responsible for the topological properties.

–

Presenters

  • Ramakanta Chapai

    • Louisiana State University
    • Physics and Astronomy, Louisiana State University

Authors

  • Ramakanta Chapai

    • Louisiana State University
    • Physics and Astronomy, Louisiana State University

  • David E Graf

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Tallahassee, FL
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • National High Magnetic Field Lab
    • NHMFL, Tallahassee, FL, United States
    • Florida State University
    • National High Magnetic Field Laboratory, Florida State University
    • NHMFL-FSU
    • National High Magnetic Field Laboratory and Florida State University
    • NHMFL

  • John Ditusa

    • Louisiana State University
    • Physics and Astronomy Department, Louisiana State University

  • Rongying Jin

    • Louisiana State University
    • Physics, Louisiana State University
    • Physics and astronomy, Louisiana State University
    • 2Condensed Matter Physics and Materials Science Departement, Brookhaven National Laboratory
    • Department of Physics and Astronomy, Louisiana State University
    • Physics and Astronomy, Louisiana State University