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Stabilization of topological spin textures in layered magnets has the potential to drive the development of advanced low-dimensional spintronics devices. However, achieving reliable and flexible manipulation of the topological spin textures beyond skyrmion in a two-dimensional magnet system remains challenging. Here, we demonstrate the introduction of magnetic iron atoms between the van der Waals gap of a layered magnet, FeGaTe, to modify local anisotropic magnetic interactions. Consequently, we present direct observations of the order-disorder skyrmion lattices transition. In addition, non-trivial topological solitons, such as skyrmioniums and skyrmion bags, are realized at room temperature. Our work highlights the influence of random spin control of non-trivial topological spin textures.
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http://dx.doi.org/10.1038/s41467-024-47715-5 | DOI Listing |
Nat Commun
September 2025
Physikalisches Institut, Universität Würzburg, D-97074, Würzburg, Germany.
Spin-momentum-locked edge states of quantum spin Hall insulators provide a compelling platform for spintronic applications, owing to their intrinsic protection against backscattering from non-magnetic disorder. This protection emerges from time-reversal symmetry, which pairs Kramers partners of helical edge modes with opposite spin and momentum, thereby strictly forbidding elastic single-particle backscattering within the pair. Yet, contrary to the idealized notion of linear edge bands, the non-monotonic dispersions of realistic materials can host multiple Kramers pairs, reintroducing backscattering channels between them without violating time-reversal symmetry.
View Article and Find Full Text PDFiScience
September 2025
Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNova University Center, SE-10691 Stockholm, Sweden.
The ability to efficiently control topological magnetism is crucial for advancing technological applications and deepening our understanding of magnetic systems. Although emerging van der Waals (vdW) multiferroics present a promising frontier for energy-efficient spin manipulation, the control of topological magnetism remains challenging due to its scarcity in multiferroics. Here, we demonstrate that highly tunable merons and antimerons emerge in monolayer multiferroic (CCPS).
View Article and Find Full Text PDFSmall
August 2025
Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310012, China.
Kagomé lattice magnets have recently garnered significant interest due to the pronounced transverse transport characteristics, particularly in thermoelectric and spintronic applications, stemming from the interplay between topology and magnetism. Here, a comprehensive investigation of the magnetic, electrical, and thermoelectric transport properties, as well as the complex spin configurations, is conducted in a polycrystalline Kagomé ferromagnet GdCo. Strikingly, a giant anomalous Hall conductivity ≈2125 S cm is obtained at T = 10 K, which is primarily governed by the extrinsic skew-scattering mechanism.
View Article and Find Full Text PDFEntropy (Basel)
August 2025
Faculty of Physics and Applied Computer Science, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Kraków, Poland.
Silicene is a two-dimensional silicon monolayer with a band gap caused by relatively strong spin-orbit coupling. This band gap can be steered using a vertical electric field. In turn, the change in this electric field value leads to a transition from a topological insulator to a bulk insulator regime.
View Article and Find Full Text PDFThe precise modulation of circular dichroism (CD) is essential for applications in polarization control, sensing, and imaging. Here, we report a novel, to the best of our knowledge, dual-CD response mechanism based on bound states in the continuum (BICs) in an all-dielectric silicon metasurface. By leveraging two distinct topologically protected BICs and converting them into circularly polarized eigenstates, we first demonstrate a reversal of maximum chirality at oblique incidence without requiring any structural alteration.
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