Thickness Dependent Ferromagnetism in Fe3GeTe2

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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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