Fermi surface of the type-II Dirac semimetallic candidates PdTe2 and PtTe2.

ORAL

Abstract

We investigated the electronic structures at the Fermi level and the transport properties via the Shubnikov-de Haas (SdH) and de Haas van Alphen (dHvA) effects in single-crystals of PdTe2 and PtTe2, recently claimed to be candidates for a novel type-II Dirac semimetallic state. We synthesized high-quality single-crystals, i.e. with mobilities in excess of 104 cm2/Vs, through a flux method. Both compounds display similar band structures and concomitantly complex their fermi surfaces which are not in perfect agreement with band structure calculations. The effective masses extracted from the Lifshitz-Kosevich formalism were found to be in the order of 0.01 times the free electron mass for both compounds. We also found evidence for a non-trivial Berry phase for PdTe2 compound.

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Presenters

  • Wenkai Zheng

    Natl High Magnetic Field Lab

Authors

  • Wenkai Zheng

    Natl High Magnetic Field Lab

  • Qiong Zhou

    Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab, Physics, Florida State University

  • Niraj Aryal

    Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab, National High Magnetic Field Laboratory, Florida State Univ

  • Yu-Che Chiu

    Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab, National High Magnetic Field Laboratory, Physics, Florida State University

  • Rico Schoenemann

    Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab, National High Magnetic Field Laboratory

  • Kuan-Wen Chen

    National High Magnetic Field Laboratory, Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab

  • Daniel Rhodes

    Columbia Univ, Physics, Columbia Univ, Columbia University, Mechanical Engineering, Columbia University

  • Thomas Martin

    Department of Chemistry and Biochemistry, The University of Texas at Dallas, University of Texas at Dallas

  • Gregory McCandless

    Department of Chemistry and Biochemistry, The University of Texas at Dallas, University of Texas at Dallas, Chemistry and Biochemistry, The University of Texas at Dallas

  • Julia Chan

    Department of Chemistry and Biochemistry, The University of Texas at Dallas, University of Texas at Dallas, Chemistry and Biochemistry, The University of Texas at Dallas

  • Efstratios Manousakis

    Natl. High Magnetic Field Lab, Florida State University, Natl High Magnetic Field Lab

  • Luis Balicas

    Natl High Magnetic Field Lab, Nat. High Magn. Field Lab., Florida State University, FSU-NHMFL, National High Magnetic Field Lab, National High Magnetic Field Laboratory, Natl. High Magnetic Field Lab, Florida State University, High Field Magnet Lab, 1800 E. Paul Dirac Drive, National High Magnetic Field Laboratory, Natl High Magnetic Field Lab