Chiral Helimagnetism and One-Dimensional Magnetic Solitons in a Cr-Intercalated Transition Metal Dichalcogenide
Qiu, Zi Qiang
Alshareef, Husam N.
KAUST DepartmentComputational Physics and Materials Science (CPMS)
Functional Nanomaterials and Devices Research Group
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2021-07-24
Print Publication Date2021-09
Permanent link to this recordhttp://hdl.handle.net/10754/670253
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AbstractChiral magnets endowed with topological spin textures are expected to have promising applications in next-generation magnetic memories. In contrast to the well-studied 2D or 3D magnetic skyrmions, the authors report the discovery of 1D nontrivial magnetic solitons in a transition metal dichalcogenide 2H-TaS2 via precise intercalation of Cr elements. In the synthetic Cr1/3TaS2 (CTS) single crystal, the coupling of the strong spin–orbit interaction from TaS2 and the chiral arrangement of the magnetic Cr ions evoke a robust Dzyaloshinskii–Moriya interaction. A magnetic helix having a short spatial period of ≈25 nm is observed in CTS via Lorentz transmission electron microscopy. In a magnetic field perpendicular to the helical axis, the helical spin structure transforms into a chiral soliton lattice (CSL) with the spin structure evolution being consistent with the chiral sine-Gordon theory, which opens promising perspectives for the application of CSL to fast-speed nonvolatile magnetic memories. This work introduces a new paradigm to soliton physics and provides an effective strategy for seeking novel 2D magnets.
CitationZhang, C., Zhang, J., Liu, C., Zhang, S., Yuan, Y., Li, P., … Zhang, X. (2021). Chiral Helimagnetism and One-Dimensional Magnetic Solitons in a Cr-Intercalated Transition Metal Dichalcogenide. Advanced Materials, 2101131. doi:10.1002/adma.202101131
SponsorsC.Z., J.Z., and C.L. contributed equally to this work. This work was financially supported by King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under the Award Nos. CRF-2018-3717-CRG7 and CRF-2019-4081-CRG8. This work used the resources of the Supercomputing Laboratory at KAUST. Y.P. and J.Z. would like to thank the funding support from the National Natural Science Foundation of China (51771085, 51571104, 51801087, and 91962212). Z.Q.Q. acknowledges the support from US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231 (van der Waals heterostructures program, KCWF16).
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