Thickness Dependent Ferromagnetism in Fe<sub>3</sub>GeTe<sub>2</sub>

ORAL

Abstract

Recent discoveries of intrinsic 2D ferromagnetism in van der Waals materials provide promising platforms for studying fundamental ferromagnetism in atomically thin limit. Most of these materials are found to be insulators/semiconductors and extremely sensitive to air. Here, we show that Fe3GeTe2 is a ferromagnetic metal down to monolayer limit with strong perpendicular anisotropy. Using both magneto-optical spectroscopy and electrical transport measurements, we establish the cross over from 3D to 2D Ising ferromagnetism as a function of layer thickness, which accompanies the fast drop of Curie temperature.

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National Science Foundation, MRSEC

US Department of Energy

Clean Energy Institute

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Presenters

  • Zaiyao Fei

    • Univ of Washington
    • Physics, University of Washington

Authors

  • Zaiyao Fei

    • Univ of Washington
    • Physics, University of Washington

  • Bevin Huang

    • Univ of Washington
    • Physics, Univ of Washington
    • University of Washington

  • Paul Malinowski

    • Univ of Washington

  • Tiancheng Song

    • Univ of Washington
    • University of Washington

  • Minhao He

    • Univ of Washington

  • Shua Sanchez

    • Univ of Washington

  • Andrew May

    • Oak Ridge National Lab
    • Materials Science and Technology, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory

  • David Cobden

    • Univ of Washington
    • Department of Physics, University of Washington
    • University of Washington
    • Physics, University of Washington

  • Xiaoyang Zhu

    • Columbia University
    • Physics, Columbia Univ

  • Di Xiao

    • Carnegie Mellon University
    • Physics department, Carnegie Mellon University
    • Department of Physics, Carnegie Mellon University
    • Carnegie Mellon Univ

  • Jiun-Haw Chu

    • Univ of Washington
    • Physics, Univ of Washington

  • Xiaodong Xu

    • University of Washington
    • Univ of Washington
    • Physics, Univ of Washington
    • Department of Physics, University of Washington
    • Physics, University of Washington
    • Physics, and Materials Science and Engineering, Univ of Washington
    • Department of Physics, University of Washington - Seattle