Magnetic properties of vanadium selenide epitaxial thin films

ORAL

Abstract

The discoveries of ferromagnetism in atomically-thin Cr2Ge2Te6 and CrI3 crystals have opened up an opportunity for integration of magnetic 2D materials into van der Waals heterostructures. Moreover, the recent discovery of emergent room-temperature ferromagnetism in monolayer VSe2 [1], which has been known as a paramagnetic metal in its bulk form, should provide an important step toward spintronics applications based on 2D materials, although the existence of ferromagnetism in monolayer VSe2 is still controversial [2]. We have recently found that vanadium selenide epitaxial thin films fabricated by molecular-beam epitaxy (MBE) with our growth recipe [3] exhibit peculiar magnetic properties with clear anomalous Hall effect down to 2D limit. In this presentation, we will show transport properties of our MBE-grown vanadium selenide epitaxial thin films, and discuss possible origins of this emergent ferromagnetism in our samples. [1] M. Bonilla, et. al., Nat. Nanotechnol. 13, 289 (2018). [2] J. Feng, et. al., Nano Lett. 18, 4493 (2018). [3] M. Nakano, et. al., Nano Lett. 17, 5595 (2017).

*This work was supported by Grant-in-Aid for Scientific Research (No. 25000003) from the Japan Society for the Promotion of Science.

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Presenters

  • Masaki Nakano

    • Department of Applied Physics, The University of Tokyo
    • University of Tokyo

Authors

  • Masaki Nakano

    • Department of Applied Physics, The University of Tokyo
    • University of Tokyo

  • Satoshi Yoshida

    • Department of Applied Physics, The University of Tokyo

  • Saeed Bahramy

    • The University of Tokyo
    • Department of Applied Physics, The University of Tokyo

  • Yue Wang

    • Department of Applied Physics, The University of Tokyo

  • Hideki Matsuoka

    • Department of Applied Physics, The University of Tokyo
    • University of Tokyo

  • Yuki Majima

    • Department of Applied Physics, The University of Tokyo

  • Yoshimitsu Kohama

    • ISSP, Tokyo University
    • The Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • The Institute for Solid State Physics, The University of Tokyo

  • Yuta Ohigashi

    • Department of Applied Physics, The University of Tokyo

  • Yuta Kashiwabara

    • Department of Applied Physics, The University of Tokyo

  • Masato Sakano

    • The University of Tokyo
    • Department of Applied Physics, The University of Tokyo

  • Kyoko Ishizaka

    • The University of Tokyo
    • Department of Applied Physics, The University of Tokyo

  • Yoshihiro Iwasa

    • Department of Applied Physics, The University of Tokyo
    • University of Tokyo
    • Department of applied physics, University of Tokyo
    • Department of Applied Physics, University of Tokyo
    • Quantum-Phase Electronics Center and Department of Applied Physics, University of Tokyo