Quantum Octets in Air Stable High Mobility Two-Dimensional PdSe<sub>2</sub>

ORAL

Abstract

Two-dimensional (2D) materials have drawn immense interest in scientific and technological communities, owing to their extraordinary properties that are profoundly altered from their bulk counterparts and their enriched tunability by gating, proximity, strain, and external fields. For digital applications, an ideal 2D material would have high mobility, air stability, sizable band gap, and be compatible with large-scale synthesis. Here we demonstrate air-stable field-effect transistors using atomically thin few-layer PdSe2 sheets that are sandwiched between hexagonal BN (hBN), with record high saturation current >350 µA/µm, and field effect mobilities 700 and 10,000 cm2/Vs at 300K and 2K, respectively. At low temperatures, magnetotransport studies reveal unique octets in quantum oscillations, arising from 2-fold spin and 4-fold valley degeneracies, which can be broken by in-plane and

out-of-plane magnetic fields toward quantum Hall spin and orbital ferromagnetism.

*This work is supported by NSF/DMR 2128945.

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Publication: Zhang, Y., Tian, H., Li, H., Lau, C. N. Quantum Octets in Air Stable High Mobility Two-Dimensional PdSe2. Nat Commun. (under review)

Presenters

  • Yuxin Zhang

    • The Ohio State University

Authors

  • Yuxin Zhang

    • The Ohio State University

  • Yuxin Zhang

    • The Ohio State University

  • Haidong Tian

    • The Ohio State University
    • Ohio State University

  • Huaixuan Li

    • The University of Texas at Dallas

  • Chiho Yoon

    • University of Texas at Dallas
    • The University of Texas at Dallas

  • Ryan A Nelson

    • The Ohio State University

  • Ziling Li

    • The Ohio State University

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science

  • Takashi Taniguchi

    • Kyoto Univ
    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Sciences
    • NIMS
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, NIMS, Japan
    • International Center for Materials Nanoarchitectonics, Tsukuba
    • National Institue for Materials Science
    • Kyoto University
    • National Institute of Materials Science
    • International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Dmitry Smirnov

    • National High Magnetic Field Laboratory

  • Roland K Kawakami

    • The Ohio State University

  • Joshua E Goldberger

    • The Ohio State University
    • Ohio State University

  • Fan Zhang

    • The University of Texas at Dallas

  • Chun Ning Lau

    • Ohio State University
    • Ohio State Univ - Columbus