Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe3GeTe2

ORAL

Abstract

The advent of two-dimensional van der Waals crystals creates new possibilities in developing novel spintronic devices. Recent experiments have demonstrated that it is possible to obtain two-dimensional ferromagnetic order in insulating Cr2Ge2Te6 and CrI3 at low temperatures. Here, we developed a new device fabrication technique, and successfully isolated monolayers from layered metallic magnet Fe3GeTe2. We found that the itinerant ferromagnetism persists in Fe3GeTe2 down to monolayer. The ferromagnetic transition temperature, Tc, is suppressed in pristine Fe3GeTe2 thin flakes. An ionic gate, however, dramatically raises the Tc up to room temperature. The gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2 opens up opportunities for potential voltage-controlled magnetoelectronics.

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Presenters

  • Yujun Deng

    Fudan University

Authors

  • Yujun Deng

    Fudan University

  • Yijun Yu

    Fudan University, Physics Department, Fudan University

  • Yichen Song

    Fudan University

  • Jingzhao Zhang

    The Chinese University of Hong Kong, Physics, The Chinese University of Hong Kong, Physics, The Chinese University of HongKong

  • Nai Zhou Wang

    University of Science and Technology of China

  • Zeyuan Sun

    Fudan University

  • Yangfan Yi

    Fudan University

  • Yi Zheng Wu

    Physics, Fudan university, Fudan University

  • Shiwei Wu

    Fudan University, Department of Physics, Fudan University

  • Junyi Zhu

    The Chinese University of Hong Kong, Physics, The Chinese University of Hong Kong, Physics, Chinese Univsity of Hong Kong, Physics, The Chinese University of HongKong

  • Jing Wang

    State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Fudan University

  • Xianhui Chen

    University of Science and Technology of China, Department of physics, University of Science and Technology of China

  • Yuanbo Zhang

    Fudan University, State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China, Dept. of Physics, Fudan University, Physics Department, Fudan University