Topological Kerr effects in two-dimensional magnets with broken inversion symmetry
We employ two-dimensional magnets to establish a magneto-optical hallmark of skyrmions, which we call the topological Kerr effect, using the recently discovered ferromagnet CrVI6 as a material platform. The Kerr angle hysteresis loop of this non-centrosymmetric system exhibits two antisymmetric bumps that are absent in the centrosymmetric CrI3 and VI3. We develop a minimal model to further identify the bumps as direct manifestations of the topological charge, thereby providing a magneto-optical fingerprint of skyrmions with broader applicability.
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New member added to the topological magnetic structure family: "magnetic vortices" with multiple topological charges discovered in the strong magnetic field center
The High Magnetic Field Center of the Hefei Institute of Physical Science, Chinese Academy of Sciences, in collaboration with Anhui University and the University of New Hampshire, has made breakthrough progress in the research on topological magnetic structures and their current manipulation. The paper titled "Skyrmion bundles and their current-driven dynamics" has been published in Nature Nanotechnology.
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