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Gapped Spin-1/2 Spinon Excitations in a New Kagome Quantum Spin Liquid Compound Cu_3Zn(OH)_6FBr

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Feng Zili 1   Li Zheng 1   Meng Xin 1   Yi Wei 1   Wei Yuan 1   Zhang Jun 2   Wang Yancheng 1   Jiang Wei 3   Liu Zheng 4   Li Shiyan 5   Liu Feng 3   Luo Jianlin 6   Li Shiliang 6   Zheng Guoqing 1 *   Meng Ziyang 1 *   Mei Jiawei 7 *   Shi Youguo 1 *  
文摘 We report a new kagome quantum spin liquid candidate CU_3Zn(OH)_6FBr, which does not experience any phase transition down to 50 mK, more than three orders lower than the antiferromagnetic Curie-Weiss temperature (~200K). A clear gap opening at low temperature is observed in the uniform spin susceptibility obtained from 19F nuclear magnetic resonance measurements. We observe the characteristic magnetic field dependence of the gap as expected for fractionalized spin-1/2 spinon excitations. Our experimental results provide firm evidence for spin fractionalization in a topologically ordered spin system, resembling charge fractionalization in the fractional quantum Hall state.
来源 Chinese Physics Letters ,2017,34(7):077502-1-077501-5 【核心库】
DOI 10.1088/0256-307X/34/7/077502
地址

1. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190  

2. Department of Physics, and Laboratory of Advanced Materials, Fudan University, State Key Laboratory of Surface Physics, Shanghai, 200433  

3. Department of Materials Science and Engineering, University of Utah, USA, Salt Lake, 84112  

4. Institute for Advanced Study, Tsinghua University, Beijing, 100084  

5. Department of Physics, and Laboratory of Advanced Materials, Fudan University, State Key Laboratory of Surface Physics;;Collaborative Innovation Center of Advanced Microstructures, Shanghai, 200433  

6. Institute of Physics, Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Beijing, 100190  

7. Institute for Quantum Science and Engineering, and Department of Physics, Southern University of Science and Technology, Shenzhen, 518055

语种 英文
文献类型 研究性论文
ISSN 0256-307X
学科 物理学
基金 Supported by the National Key Research and Development Program of China ;  国家自然科学基金 ;  国家973计划 ;  the National Thousand-Young-Talents Program of China, the Strategic Priority Research Program (B) of the Chinese Academy of Sciences ;  The work in Utah is supported by DOE-BES
文献收藏号 CSCD:6049474

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引证文献 2 篇

1 Feng Zili From Claringbullite to a New Spin Liquid Candidate Cu_3Zn(OH)_6FCl Chinese Physics Letters,2019,36(1):017502
CSCD被引 1 次

2 Jia Yating Mott Transition and Superconductivity in Quantum Spin Liquid Candidate NaYbSe_2 Chinese Physics Letters,2020,37(9):097404
CSCD被引 11 次

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