Bimeron clusters in chiral antiferromagnets

Xiaoguang Li; Laichuan Shen; Yuhao Bai; Junlin Wang; Xichao Zhang; Jing Xia; Motohiko Ezawa; Oleg A. Tretiakov; Xiaohong Xu; Michal Mruczkiewicz; Maciej Krawczyk; Yongbing Xu; Richard F.L. Evans; Roy W. Chantrell; Yan Zhou

doi:10.1038/s41524-020-00435-y

Bimeron clusters in chiral antiferromagnets

Xiaoguang Li, Laichuan Shen, Yuhao Bai, Junlin Wang, Xichao Zhang, Jing Xia, Motohiko Ezawa, Oleg A. Tretiakov, Xiaohong Xu, Michal Mruczkiewicz, Maciej Krawczyk, Yongbing Xu, Richard F.L. Evans, Roy W. Chantrell, Yan Zhou^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A magnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion. Despite the topological equivalence, their statics and dynamics could be distinct, making them attractive from the perspectives of both physics and spintronic applications. In this work, we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic (AFM) thin film with interfacial Dzyaloshinskii–Moriya interaction (DMI). Bimerons demonstrate high current-driven mobility as generic AFM solitons, while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-of-plane polarizations, respectively. Moreover, these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of Néel topological numbers. The clustering involves the rearrangement of topological structures, and gives rise to remarkable changes in static and dynamical properties. The merits of AFM bimeron clusters reveal a potential path to unify multibit data creation, transmission, storage, and even topology-based computation within the same material system, and may stimulate spintronic devices enabling innovative paradigms of data manipulations.

Original language	English
Article number	169
Number of pages	9
Journal	npj Computational Materials
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/s41524-020-00435-y
Publication status	Published - 10 Nov 2020

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Li_et_al-2020-npj_Computational_Materials
© The Author(s) 2020
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title = "Bimeron clusters in chiral antiferromagnets",

abstract = "A magnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion. Despite the topological equivalence, their statics and dynamics could be distinct, making them attractive from the perspectives of both physics and spintronic applications. In this work, we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic (AFM) thin film with interfacial Dzyaloshinskii–Moriya interaction (DMI). Bimerons demonstrate high current-driven mobility as generic AFM solitons, while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-of-plane polarizations, respectively. Moreover, these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of N{\'e}el topological numbers. The clustering involves the rearrangement of topological structures, and gives rise to remarkable changes in static and dynamical properties. The merits of AFM bimeron clusters reveal a potential path to unify multibit data creation, transmission, storage, and even topology-based computation within the same material system, and may stimulate spintronic devices enabling innovative paradigms of data manipulations.",

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AU - Li, Xiaoguang

AU - Shen, Laichuan

AU - Bai, Yuhao

AU - Wang, Junlin

AU - Zhang, Xichao

AU - Xia, Jing

AU - Ezawa, Motohiko

AU - Tretiakov, Oleg A.

AU - Xu, Xiaohong

AU - Mruczkiewicz, Michal

AU - Krawczyk, Maciej

AU - Xu, Yongbing

AU - Evans, Richard F.L.

AU - Chantrell, Roy W.

AU - Zhou, Yan

PY - 2020/11/10

Y1 - 2020/11/10

N2 - A magnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion. Despite the topological equivalence, their statics and dynamics could be distinct, making them attractive from the perspectives of both physics and spintronic applications. In this work, we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic (AFM) thin film with interfacial Dzyaloshinskii–Moriya interaction (DMI). Bimerons demonstrate high current-driven mobility as generic AFM solitons, while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-of-plane polarizations, respectively. Moreover, these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of Néel topological numbers. The clustering involves the rearrangement of topological structures, and gives rise to remarkable changes in static and dynamical properties. The merits of AFM bimeron clusters reveal a potential path to unify multibit data creation, transmission, storage, and even topology-based computation within the same material system, and may stimulate spintronic devices enabling innovative paradigms of data manipulations.

AB - A magnetic bimeron is an in-plane topological counterpart of a magnetic skyrmion. Despite the topological equivalence, their statics and dynamics could be distinct, making them attractive from the perspectives of both physics and spintronic applications. In this work, we demonstrate the stabilization of bimeron solitons and clusters in the antiferromagnetic (AFM) thin film with interfacial Dzyaloshinskii–Moriya interaction (DMI). Bimerons demonstrate high current-driven mobility as generic AFM solitons, while featuring anisotropic and relativistic dynamics excited by currents with in-plane and out-of-plane polarizations, respectively. Moreover, these spin textures can absorb other bimeron solitons or clusters along the translational direction to acquire a wide range of Néel topological numbers. The clustering involves the rearrangement of topological structures, and gives rise to remarkable changes in static and dynamical properties. The merits of AFM bimeron clusters reveal a potential path to unify multibit data creation, transmission, storage, and even topology-based computation within the same material system, and may stimulate spintronic devices enabling innovative paradigms of data manipulations.

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Bimeron clusters in chiral antiferromagnets

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