Discovery of a quantum topological kagome magnet by vector magnetic field-based STM*

Kagome magnets have been known to exhibit rich topologically based vector magnetic field responses, including giant and anisotropic spin-orbit tunability (J.-X. Yin et al. Nature 562, 91-95 (2018)) and negative flatband magnetism (J.-X. Yin et al. Nature Physics 15, 443-448 (2019)). Here we use the same vector magnetic field-based STM technique combined with Berry curvature sensitive transport to discover a new quantum topological kagome magnet. We observe striking Landau quantization of the kagome lattice, dissipationless chiral edge state, and quantum-limit Hall response. These combined results point to the realization of a high-temperature quantum topological kagome magnet.