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

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

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

charge density wavekagomedisordered structurefluctuations

Chenfei Shi、Yi Liu、Bishal Baran Maity、Qi Wang、Surya Rohith Kotla、Sitaram Ramakrishnan、Claudio Eisele、Harshit Agarwal、Leila Noohinejad、Qian Tao、Baojuan Kang、Zhefeng Lou、Xiaohui Yang、Yangpeng Qi、Xiao Lin、Zhu-Au Xu、Arumugam Thamizhavel、Guang-Han Cao、Sander van Smaalen、Shixun Cao、Jin-Ke Bao

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Department of Physics,Materials Genome Institute,Institute for Quantum Science and Technology,Shanghai University,Shanghai 200444,China

Key Laboratory of Quantum Precision Measurement of Zhejiang Province,School of Physics,Zhejiang University of Technology,Hangzhou 310023,China

School of Physics,Zhejiang University,Hangzhou 310027,China

Department of Condensed Matter Physics and Materials Science,Tata Institute of Fundamental Research,Mumbai 400005,India

School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China

ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China

Laboratory of Crystallography,University of Bayreuth,Bayreuth 95447,Germany

Department of Quantum Matter AdSE,Hiroshima University,Higashi-Hiroshima 739-8530,Japan

P24,PETRA Ⅲ,Deutsches Elektronen-Synchrotron DESY,Hamburg 22607,Germany

Key Laboratory for Quantum Materials of Zhejiang Province,School of Science,Westlake University,Hangzhou 310024,China

Department of Physics,China Jiliang University,Hangzhou 310018,China

Shanghai Key Laboratory of High-resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210,China

Collaborative Innovation Centre of Advanced Microstructures,Nanjing University,Nanjing 210093,China

Shanghai Key Laboratory of High Temperature Superconductors,Shanghai University,Shanghai 200444,China

School of Physics,Hangzhou Normal University,Hangzhou 311121,China

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charge density wave kagome disordered structure fluctuations

2024

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子:0.91
ISSN:1674-7348
年,卷(期):2024.67(11)