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.

*This material is based upon work supported by the Spins and Heat in Nanoscale Electronic Systems (SHINES), an EFRC funded by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences under award S000686:03.

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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