Tunneling Spectroscopy Studies of Two-Dimensional van der Waals Magnets

ORAL

Abstract

Two-dimensional magnetic materials have opened new avenues for scientific exploration and innovative device design. Here we present the properties of ferromagnetic Mn(Bi0.88,Sb0.18)6Te10 by combining magneto-transport and transport tunneling spectroscopy. Planar tunnel junction devices are made through synthesis, exfoliation, and the van der Waals dry transfer technique. We probe the density of states and inelastic excitations near the sample’s surface in a wide range of temperatures and in-plane and perpendicular magnetic fields. At zero magnetic field, we observe multiple strongly T-dependent resonant peaks in the tunneling spectra of Mn(Bi0.88,Sb0.18)6Te10. The magnetic field dependence of some of the features points to the development of Landau levels of Mn(Bi0.88,Sb0.18)6Te10 , which are absent in control samples. We discuss the implications of our results using input from band structure calculations and ARPES. The tunnel junction technique is also applied to an anti-ferromagnet CrSBr. We make connections between transport, tunneling spectra and the magnetic phase diagram of this material.

*NSF-DMR2039351

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Presenters

  • Carlton Drew

    • Pennsylvania State University

Authors

  • Carlton Drew

    • Pennsylvania State University

  • CHANDAN DE

    • Pennsylvania State University

  • Seng Huat Lee

    • Pennsylvania 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

  • Zhiqiang Mao

    • Pennsylvania State University
    • Pennslyvania State University

  • Jun Zhu

    • Pennsylvania State University