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<p>The symmetry breaking density waves and their interplay with spin and charge are crucial for understanding the correlated electronic states in quantum materials. However, symmetry-breaking density waves involving simultaneous charge and spin modulations remain largely unexplored. Here, we report the unconventional spin-intertwined charge density wave in magnetic kagome metal GdTi<sub>3</sub>Bi<sub>4</sub> by scanning tunneling spectroscopy. We observe a 3Q charge density wave that is incommensurate with the crystalline lattice in both periodicity and orientation and breaks all mirror and rotation symmetries. The CDW undergoes incommensurate-commensurate transitions in a magnetic field and 3Q-1Q transitions as a function of applied magnetic field and temperature. Remarkably, the quantum and thermal melting of the CDW exhibits a phase structure closely resembling the bulk magnetization phase diagram of GdTi<sub>3</sub>Bi<sub>4</sub>, which provides evidence for the observation and manipulation of spin-intertwined CDW as a bulk property. Our findings reveal the microscopic textures of the intricate magnetic phases with unconventional charge-spin coupling, and offer insights into a broad class of multi-components density wave formation in kagome and other correlated quantum materials.</p>

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Unconventional spin-intertwined charge density wave in magnetic phases of kagome metal GdTi3Bi4

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月12日

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  • Xianghe Han,
  • Hui Chen,
  • Zhongyi Cao,
  • Jingwen Guo,
  • Chuyi Tuo,
  • Ming-Rui Li,
  • Fucong Fei,
  • Hengxin Tan,
  • Jianfeng Guo,
  • Yanhao Shi,
  • Runnong Zhou,
  • Ruwen Wang,
  • Zhen Zhao,
  • Haitao Yang,
  • Fengqi Song,
  • Hong Yao,
  • Binghai Yan,
  • Shiyu Zhu,
  • Ziqiang Wang,
  • Hong-Jun Gao

摘要

The symmetry breaking density waves and their interplay with spin and charge are crucial for understanding the correlated electronic states in quantum materials. However, symmetry-breaking density waves involving simultaneous charge and spin modulations remain largely unexplored. Here, we report the unconventional spin-intertwined charge density wave in magnetic kagome metal GdTi3Bi4 by scanning tunneling spectroscopy. We observe a 3Q charge density wave that is incommensurate with the crystalline lattice in both periodicity and orientation and breaks all mirror and rotation symmetries. The CDW undergoes incommensurate-commensurate transitions in a magnetic field and 3Q-1Q transitions as a function of applied magnetic field and temperature. Remarkably, the quantum and thermal melting of the CDW exhibits a phase structure closely resembling the bulk magnetization phase diagram of GdTi3Bi4, which provides evidence for the observation and manipulation of spin-intertwined CDW as a bulk property. Our findings reveal the microscopic textures of the intricate magnetic phases with unconventional charge-spin coupling, and offer insights into a broad class of multi-components density wave formation in kagome and other correlated quantum materials.