Generation and Detection of Dresselhaus-Like Spin Current in a Single-Crystal Ferromagnetic Metal

Wentao Wang; Ze Yan; Yang CaoCunxu GaoZhong ShiMingsu SiJiangwei CaoLi XiDezheng YangDesheng Xue

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Generation and Detection of Dresselhaus-Like Spin Current in a Single-Crystal Ferromagnetic Metal

机译：Generation and Detection of Dresselhaus-Like Spin Current in a Single-Crystal Ferromagnetic Metal

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Distinct from the existing spin–orbit torque devices to only generate Rashbalikespin current, it is proposed to generate Dresselhaus-like spin currentbased on a single-crystal ferromagnetic metal. By employing the secondharmonic Hall measurement, it is found that the second harmonic Hall signalin single-crystal ferromagnet exhibits an antisymmetric angular dependenceinduced by Dresselhaus-like spin current, opposite to the reported symmetricangular dependence induced by Rashba-like spin current. Such anomalousDresselhaus-like spin current is further confirmed by the current-inducedshift of the hysteresis loop when the magnetic field is swept along the currentdirection. However, when the ferromagnetic metal exhibits amorphous crystalstructure or polycrystal structure, the Dresselhaus-like spin current is absent.This result complements the missing type of spin currents due to charge-tospinconversion and benefits the formulation of comprehensive spin–orbitcoupling mechanism, by considering additional broken symmetry caused byferromagnetic order and the structure symmetry of the crystalline lattice.

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《Advanced functional materials》 |2022年第33期|2204212.1-2204212.8|共8页
作者
Wentao Wang; Ze Yan; Yang CaoCunxu GaoZhong ShiMingsu SiJiangwei CaoLi XiDezheng YangDesheng Xue;
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作者单位

Key Laboratory for Magnetism and Magnetic Materials of Ministry ofEducationLanzhou UniversityLanzhou 730000, China,Institute of Modern PhysicsChinese Academy of ScienceLanzhou 730000, China;

Key Laboratory for Magnetism and Magnetic Materials of Ministry ofEducationLanzhou UniversityLanzhou 730000, China;

Shanghai Key Laboratory of Special Artificial Microstructure and Schoolof Physics Science and EngineeringTongji UniversityShanghai 200092, China;

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single-crystal ferromagnetic thin films; spin–orbit torque; symmetry broken;

Generation and Detection of Dresselhaus-Like Spin Current in a Single-Crystal Ferromagnetic Metal

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