Annealing-induced long-range charge density wave order in magnetic kagome FeGe:Fluctuations and disordered structure

被引：0

作者：

Chenfei Shi ^{[1
]}

Yi Liu ^{[2
,3
]}

Bishal Baran Maity ^{[4
]}

Qi Wang ^{[5
,6
]}

Surya Rohith Kotla ^{[7
]}

Sitaram Ramakrishnan ^{[8
]}

Claudio Eisele ^{[7
]}

Harshit Agarwal ^{[7
]}

Leila Noohinejad ^{[9
]}

Qian Tao ^{[3
]}

Baojuan Kang ^{[1
]}

Zhefeng Lou ^{[10
]}

Xiaohui Yang ^{[11
]}

Yanpeng Qi ^{[5
,6
,12
]}

Xiao Lin ^{[10
]}

ZhuAn Xu ^{[3
,13
]}

Arumugam Thamizhavel ^{[4
]}

GuangHan Cao ^{[3
,13
]}

Sander van Smaalen ^{[7
]}

Shixun Cao ^{[1
,14
]}

JinKe Bao ^{[1
,14
,15
]}

机构：

[1] Department of Physics, Materials Genome Institute, Institute for Quantum Science and Technology,Shanghai University

[2] Key Laboratory of Quantum Precision Measurement of Zhejiang Province, School of Physics, Zhejiang University of Technology

[3] School of Physics, Zhejiang University

[4] Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research

[5] School of Physical Science and Technology, ShanghaiTech University

[6] ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University

[7] Laboratory of Crystallography, University of Bayreuth

[8] Department of Quantum Matter, AdSE, Hiroshima University

[9] P, PETRA Ⅲ, Deutsches Elektronen-Synchrotron DESY

[10] Key Laboratory for Quantum Materials of Zhejiang Province, School of Science, Westlake University

[11] Department of Physics, China Jiliang University

[12] Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University

[13] Collaborative Innovation Centre of Advanced Microstructures, Nanjing University

[14] Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University

[15] School of Physics, Hangzhou Normal

来源：

ScienceChina(Physics,Mechanics&Astronomy) | 2024年 / 11期

关键词：

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Charge density wave（CDW） in kagome materials with the geometric frustration is able to carry unconventional characteristics.Recently, a CDW has been observed below the antiferromagnetic order in kagome FeGe, in which magnetism and CDW are intertwined to form an emergent quantum ground state. However, the CDW is only short-ranged and the structural modulation originating from it has yet to be determined experimentally. Here we realize a long-range CDW order by post-annealing process,and resolve the structure model through single crystal X-ray diffraction. Occupational disorder of Ge resulting from short-range CDW correlations above TCDW is identified from structure refinements. The partial dimerization of Ge along the c axis is unveiled to be the dominant distortion for the CDW. Occupational disorder of Ge is also proved to exist in the CDW phase due to the random selection of partially dimerized Ge sites. Our work provides useful insights for understanding the unconventional nature of the CDW in FeGe.

引用

页码：116 / 125

页数：10

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