Realization and Current-Driven Dynamics of Fractional Hopfions and Their Ensembles in a Helimagnet FeGe

Xiuzhen Yu; Yizhou Liu; Konstantin V. IakoubovskiiKiyomi NakajimaNaoya KanazawaNaoto NagaosaYoshinori Tokura

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Realization and Current-Driven Dynamics of Fractional Hopfions and Their Ensembles in a Helimagnet FeGe

机译：Realization and Current-Driven Dynamics of Fractional Hopfions and Their Ensembles in a Helimagnet FeGe

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3D topological spin textures—hopfions—are predicted in helimagnetic systemsbut are not experimentally confirmed thus far. By utilizing an externalmagnetic field and electric current in the present study, 3D topological spintextures are realized, including fractional hopfions with nonzero topologicalindex, in a skyrmion-hosting helimagnet FeGe. Microsecond current pulsesare employed to control the dynamics of the expansion and contraction ofa bundle composed of a skyrmion and a fractional hopfion, as well as itscurrent-driven Hall motion. This research approach has demonstrated thenovel electromagnetic properties of fractional hopfions and their ensemblesin helimagnetic systems.

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《Advanced Materials》 |2023年第20期|2210646.1-2210646.9|共9页
作者
Xiuzhen Yu; Yizhou Liu; Konstantin V. IakoubovskiiKiyomi NakajimaNaoya KanazawaNaoto NagaosaYoshinori Tokura;
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Department of Applied PhysicsUniversity of TokyoTokyo 113-8656, Japan;

Department of Applied PhysicsUniversity of TokyoTokyo 113-8656, Japan, Tokyo CollegeUniversity of TokyoTokyo 113-8656, Japan;

RIKEN Center for Emergent Matter Science (CEMS)Wako 351-0198, Japan;

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正文语种英语
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current-driven dynamics; helimagnet; hopfion; Lorentz transmission electron microscopy; micromagnetic simulation;

Realization and Current-Driven Dynamics of Fractional Hopfions and Their Ensembles in a Helimagnet FeGe

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