Interwoven magnetic kagome metal overcomes geometric frustration

作者：Erjian Cheng, Kaipu Wang, Yiqing Hao, Wenqing Chen, Hengxin Tan, Zongkai Li, Meixiao Wang, Wenli Gao, Di Wu, Shuaishuai Sun, Tianping Ying, Simin Nie, Yiwei Li, Walter Schnelle, Houke Chen, Xingjiang Zhou, Ralf Koban, Yulin Chen, Binghai Yan, Yi-feng Yang, Weida Wu, Zhongkai Liu, Claudia Felser · 发表于：Nature Materials · 年份：2025 · DOI：10.1038/s41563-025-02414-4 · 被引用次数：10 · 研究领域：Topological Materials and Phenomena、Quantum and electron transport phenomena、Cold Atom Physics and Bose-Einstein Condensates

Abstract Magnetic kagome materials provide a platform for exploring magneto-transport phenomena, symmetry breaking and charge ordering driven by the intricate interplay among electronic structure, topology and magnetism. Yet geometric frustration in conventional kagome magnets limits their tunability. Here we propose a design strategy for interweaving quasi-one-dimensional magnetic Tb zigzag chains with non-magnetic Ti-based kagome bilayers in TbTi 3 Bi 4 . Comprehensive spectroscopic analyses reveal coexisting elliptical-spiral magnetic and spin-density-wave orders accompanied by a large ~90 meV band-folding gap. The combined magnetic and electronic state leads to a giant anomalous Hall conductivity of 10 5 Ω −1 cm −1 , which exceeds that observed in frustrated kagome analogues. These results establish TbTi 3 Bi 4 as a model system of magnetic kagome metals with strong electron–magnetism interactions and underscore the necessity of interweaving designed magnetic and charge layers separately to achieve tunable transport properties. This design strategy will enable the discovery of emergent quantum states and next-generation electronic materials.