Interwoven magnetic kagome metal overcomes geometric frustration

Journal article

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 TbTi3Bi4. 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 105 Ω−1 cm−1, which exceeds that observed in frustrated kagome analogues. These results establish TbTi3Bi4 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.

Authors: Cheng, E; Wang, K; Hao, Y; Chen, W; Tan, H

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Nature Research
• Journal: Nature Materials
• Volume: 25
• Issue: 4
• Pages: 602-609
• Publication date: 2025-12-22
• Acceptance date: 2025-10-16
• DOI: 10.1038/s41563-025-02414-4
• EISSN: 1476-4660
• ISSN: 1476-1122
• Language: English
• Keywords: Curse of dimensionality; Folding (DSP implementation); Condensed matter physics; Hall effect; Physics; Materials science; Mathematics; Quantum mechanics; Electrical resistivity and conductivity; Engineering; Statistics; Electrical engineering