首页|Dzyaloshinskii-Moriya interaction and field-free sub-10 nm topological magnetism in Fe/bismuth oxychalcogenides heterostructures

Dzyaloshinskii-Moriya interaction and field-free sub-10 nm topological magnetism in Fe/bismuth oxychalcogenides heterostructures

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Topological magnetism with strong robustness,nanoscale dimensions and ultralow driving current density(～106 A/m2)is promising for applications in information sensing,storage,and processing,and thus sparking widespread research interest.Exploring candidate material systems with nanoscale size and easily tunable properties is a key for re-alizing practical topological magnetism-based spintronic devices.Here,we propose a class of ultrathin heterostructures,Fe/Bi2O2X(X=S,Se,Te)by deposing metal Fe on quasi-two-dimensional(2D)bismuth oxychalcogenides Bi2O2X(X=S,Se,Te)with excellent ferroelectric/ferroelastic properties.Large Dzyaloshinskii-Moriya interaction(DMI)and topological magnetism can be realized.Our atomistic spin dynamics simulations demonstrate that field-free vortex-antivortex loops and sub-10 nm skyrmions exist in Fe/Bi2O2S and Fe/Bi2O2Se interfaces,respectively.These results provide a possible strategy to tailor topological magnetism in ultrathin magnets/2D materials interfaces,which is extremely vital for spintronics applications.

Dzyaloshinskii-Moriya interactionfield-freetopological magnetism

王垚元、游龙、常凯、杨洪新

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School of Integrated Circuits,Huazhong University of Science and Technology,Wuhan 430074,China

Center for Quantum Matter,School of Physics,Zhejiang University,Hangzhou 310058,China

Shenzhen Huazhong University of Science and Technology Research Institute,Shenzhen 518000,China

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of Chinathe"Pioneer"and"Leading Goose"R&D Program of Zhejiang ProvinceNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShenzhen Science and Technology Program

2022YFA14051002022YFA14036012020AAA01090052023YFB45021002022C0105312174405122044971232780662074063JCYJ20220818103410022

2024

10.1088/1674-1056/ad6a0e

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(9)