Magnetization Switching via Giant Spin-Orbit Torque in a Magnetically Doped Topological Insulator Heterostructure

ORAL

Abstract

The magnetization switching induced by in-plane current in a Chromium-doped topological insulator bilayer heterostructure has been observed and is attributed to a giant spin-orbit toque. The critical current density of around 10$^{\mathrm{4}}$ A/cm$^{\mathrm{2}}$ for magnetization switching is nearly three orders of magnitude lower than in the traditional heavy metal/ferromagnetic heterostructures. The effective magnetic field arising from the spin-orbit torque is also increased by three orders. This giant spin-orbit torque and efficient current-induced magnetization switching may lead to innovative spintronics applications such as ultra-low power dissipation memory and logic devices.

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Authors

  • Yabin Fan

    University of California, Los Angeles, Univ of California - Los Angeles

  • Pramey Upadhyaya

    University of California, Los Angeles

  • Xufeng Kou

    University of California, Los Angeles, Univ of California - Los Angeles

  • Murong Lang

    University of California, Los Angeles, Univ of California - Los Angeles

  • So Takei

    University of California, Los Angeles

  • Zhenxing Wang

    University of California, Los Angeles

  • Jianshi Tang

    University of California, Los Angeles

  • Liang He

    Dept. of Elec. Eng., UCLA, Physics and Astronomy, University of North Carolina at Chapel Hill, University of California, Los Angeles, Univ of California - Los Angeles

  • LiTe Chang

    University of California, Los Angeles, Univ of California - Los Angeles

  • Mohammad Montazeri

    Dep. of Electrical Engineering, University of California, Los Angeles, CA 90095, University of California, Los Angeles, University of Cincinnati

  • Guoqiang Yu

    University of California, Los Angeles

  • Wanjun Jiang

    University of California, Los Angeles

  • Tianxiao Nie

    University of California, Los Angeles, Univ of California - Los Angeles

  • Yaroslav Tserkovnyak

    Department of Physics and Astronomy, University of California, Los Angeles, Univ of California - Los Angeles, University of California, Los Angeles, UCLA, University of California Los Angeles

  • Kang L. Wang

    Univ of California - Los Angeles, University of California, Los Angeles, Device Research Laboratory, Department of Electrical Engineering, University of California, Los Angeles, California, 90095, USA