Observation of Quantum Oscillations in PdTe2 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.

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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