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| Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe | |
| 2025-02-28 | |
| 发表期刊 | PHYSICAL REVIEW LETTERS (IF:8.1[JCR-2023],8.3[5-Year]) |
| ISSN | 0031-9007 |
| EISSN | 1079-7114 |
| 卷号 | 134期号:8 |
| 发表状态 | 已发表 |
| DOI | 10.1103/PhysRevLett.134.086902 |
| 摘要 | We report on the charge dynamics of kagome FeGe, an antiferromagnet with a charge density wave (CDW) transition at TCDW105 K, using polarized infrared spectroscopy and band structure calculations. We reveal pronounced optical anisotropy along the a and c axis, as well as an unusual response associated with three-dimensional CDW order. Above TCDW, there is a notable transfer of spectral weight (SW) from high to low energies, promoted by the magnetic splitting-induced shift in bands. Across the CDW transition, we observe a sudden SW transfer from low to high energies over a broad range, along with the emergence of new excitations around 1200 cm-1. These results contrast with observations from other kagome metals like CsV3Sb5, where the nesting of VHSs leads to a clear CDW gap feature. Instead, our findings can be accounted for by a 2×2×2 CDW ground state driven by a first-order structural transition involving large partial Ge1 dimerization. Our Letter thus unveils a complex interplay among structure, magnetism, and charge order, offering valuable insights for a comprehensive understanding of CDW order in FeGe. © 2025 American Physical Society. |
| 关键词 | Antiferromagnetism - Cesium alloys - Charge density waves - Germanium compounds Antiferromagnets - Band structure calculation - Charge dynamics - Charge-density-waves - Density wave transition - High-to-low - Infrared bands - Optical- - Polarized infrared spectroscopy - Spectral weight |
| URL | 查看原文 |
| 收录类别 | EI ; SCI |
| 语种 | 英语 |
| 资助项目 | National Key Research and Development Program of China["2022YFA1403900","2024YFA1408301","2023YFA1406002","2023YFA1607400"] ; National Natural Science Foundation of China["12274442","12374155","12404161","12174180"] ; Chinese Academy of Sciences[XDB33010100] ; US NSF[DMR-2401084] ; Robert A. Welch Foundation[C-1839] |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| WOS记录号 | WOS:001452495600001 |
| 出版者 | American Physical Society |
| EI入藏号 | 20251017987493 |
| EI主题词 | Optical anisotropy |
| EI分类号 | 1301.1.2 Physical Properties of Gases, Liquids and Solids - 202.9.1 Alkali Metals - 701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 804.2 Inorganic Compounds |
| 原始文献类型 | Journal article (JA) |
| 文献类型 | 期刊论文 |
| 条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/497022 |
| 专题 | 物质科学与技术学院 物质科学与技术学院_PI研究组_齐彦鹏组 物质科学与技术学院_公共科研平台_拓扑物理实验室 物质科学与技术学院_PI研究组_刘健鹏组 |
| 通讯作者 | Zhao, Jianzhou; Qi, Yanpeng; Xu, Bing; Qiu, Xianggang |
| 作者单位 | 1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing; 100190, China; 2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing; 100049, China; 3.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 4.ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai; 201210, China; 5.Department of Physics and Astronomy, Rice University, Houston; TX; 77005, United States; 6.National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing; 210093, China; 7.Co-Innovation Center for New Energetic Materials, Southwest University of Science and Technology, Sichuan, Mianyang; 621010, China; 8.Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai; 201210, China |
| 通讯作者单位 | 物质科学与技术学院; 上海科技大学 |
| 推荐引用方式 GB/T 7714 | Yi, Shaohui,Liao, Zhiyu,Wang, Qi,et al. Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe[J]. PHYSICAL REVIEW LETTERS,2025,134(8). |
| APA | Yi, Shaohui.,Liao, Zhiyu.,Wang, Qi.,Ma, Haiyang.,Liu, Jianpeng.,...&Qiu, Xianggang.(2025).Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe.PHYSICAL REVIEW LETTERS,134(8). |
| MLA | Yi, Shaohui,et al."Charge Dynamics of an Unconventional Three-Dimensional Charge Density Wave in Kagome FeGe".PHYSICAL REVIEW LETTERS 134.8(2025). |
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