Planar Hall effect induced by spin-orbit coupling in a thin-film MnTe

ORAL

Abstract

Recent developments in antiferromagnetic spintronics have demonstrated that a special case of anomalous Hall effect: planar Hall effect (PHE) or anisotropic Hall effect can be employed as a reliable read-out scheme. This has been known to originate from the spin-orbit coupling effect in many bulk antiferromagnetic crystals. Here we theoretically show that the PHE in MnTe thin films comes from the Fermi rings at the gamma point induced by a unique type of spin-orbital coupling. First-principle calculations and group-theory analysis demonstrate that the rotation symmetry of a fourth-order k dot p model has a period of π, which explains the behavior of the PHE signal in a rotating in-plane magnetic field. Furthermore, an analytical solution to the Boltzmann transport equation explicitly demonstrates that the Hall effect may originate from the spin-dependent scattering off spin-polarized defects in the antiferromagnetic order.

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Presenters

  • Gen Yin

    Electrical Engineering, University of California, Los Angeles, Electrical and Computer Engineering, University of California, Los Angeles

Authors

  • Gen Yin

    Electrical Engineering, University of California, Los Angeles, Electrical and Computer Engineering, University of California, Los Angeles

  • Jie-Xiang Yu

    Univ of New Hamsphire, Univ of New Hampshire, Physics, University of New Hampshire

  • Yizhou Liu

    Department of Electrical and Computer Engineering, University of California, Riverside, Electrical and Computer Engineering, University of California, Riverside

  • Roger Lake

    Electrical and computer Engineering, Univ of California - Riverside, Department of Electrical and Computer Engineering, University of California, Riverside, University of California, Riverside, Univ of California - Riverside, Electrical and Computer Engineering, University of California, Riverside, University of Califoria Riverside, University of California Riverside, Department of Electrical and Computer Engineering, Univ of California - Riverside, Electrical and Computer Engineering, University of California Riverside

  • Jiadong Zang

    Univ of New Hamsphire, Univ of New Hampshire, Physics, University of New Hampshire

  • Kang Wang

    University of California, Los Angeles, Univ of California - Los Angeles, Department of Electrical Engineering, University of California, Los Angeles, Department of Electrical Engineering, UCLA, University of California Los Angeles, UCLA, Department of Electrical Engineering, Univ of California - Los Angeles, Electrical and Computer Engineering, University of California, Los Angeles, Electrical Engineering, UCLA