Ferroelectric field effect in few-layer CrCl<sub>3</sub> tunnel junctions top-gated by PbZr<sub>0.2</sub>Ti<sub>0.8</sub>O<sub>3</sub> membranes

ORAL

Abstract

We report the ferroelectric gating control of few-layer antiferromagnetic CrCl3 tunnel junctions. High-quality CrCl3 flakes are synthesized on mica by the physical vapor transport technique [1]. Epitaxial ferroelectric PbZr0.2Ti0.8O3 (PZT) films (50 nm) are deposited on Sr3Al2O6 (SAO) buffered (001) SrTiO3 substrates and suspended via dissolving the SAO layer in water. Selected few-layer CrCl3 flakes are fabricated into graphite/CrCl3/graphite tunnel junctions by the all-dry stamping transfer method, which are encapsulated by either PZT membranes or h-BN flakes. Using conductive atomic force microscopy, we pole the PZT top-layer to uniformly polarized up and down states. Polarization reversal leads to nonvolatile modulation of the tunneling current, with an on/off ratio of 106 obtained at room temperature. Compared with h-BN encapsulated devices, the PZT-gated CrCl3 tunnel junctions exhibit distinct magnetotransport properties. The tunneling magnetoresistance changes sign at low temperature, suggesting a change of magnetic state. Our study provides an effectively strategy to design CrCl3-based nonvolatile memory and spintronic applications.

*This work was supported by NSF (DMR-2118828 and Nebraska ERSCoR OIA-2044049) and Nebraska Center for Energy Sciences Research.

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Publication: Jia Wang, et al., arXiv:2208.06298 (2022).

Presenters

  • Jia Wang

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • University of Nebraska-Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and NanoscienceUniversity of Nebraska-Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln

Authors

  • Jia Wang

    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • University of Nebraska-Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and NanoscienceUniversity of Nebraska-Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln

  • Qiuchen Wu

    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and NanoscienceUniversity of Nebraska - Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln

  • Kun Wang

    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and NanoscienceUniversity of Nebraska - Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Xia Hong

    • Physics and Astronomy, University of Nebraska-Lincoln
    • Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln