Gapped Spin-l/2 Spinon Excitations in a New Kagome Quantum Spin Liquid Compound CuaZn（OH）6FBr
- ISSN号：0256-307X
- 期刊名称：《中国物理快报：英文版》
- 时间：0
- 分类：O413.2[理学—理论物理;理学—物理] V241.558[航空宇航科学与技术—飞行器设计;航空宇航科学技术]
- 作者机构：[1]Institute of Physics, Chinese Academy of Sciences, Beijing 100190, [2]School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, [3]State Key Laboratory of Surface Physics, Department of Physics, and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, [4]Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA, [5]Institute for Advanced Study, Tsinghua University, Beijing 100084, [6]Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, [7]Collaborative Innovation Center of Quantum Matter, Beijing 100190, [8]Department of Physics, OkayamaUniversity, Okayama 700-8530, Japan, [9]Institute for Quantum Science and Engineering, and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, [10]Beijing Computational Science Research Center, Beijing 100193
- 相关基金：Supported by the National Key Research and Development Program of China under Grant Nos 2016YFA0300502, 2016YFA0300503, 2016YFA0300604, 2016YF0300300 and 2016YFA0300802, the National Natural Science Foundation of China under Grant Nos 11421092, 11474330~ 11574359, 11674406, 11374346 and 11674375, the National Basic Research Program of China （973 Program） under Grant No 2015CB921304, the National Thousand-Young-Talents Program of China, the Strategic Priority Research Program （B） of the Chinese Academy of Sciences under Grant Nos XDB07020000, XDB07020200 and XDB07020300. The work in Utah is supported by DOE-BES under Grant No DE-FG02-04ER46148.
作者：
冯子力[1], 李政[1,2], 孟鑫[1], 衣玮[1], 魏源[1], 张骏[3], 王艳成[1], 蒋伟[4], 刘峥[5], 李世燕[3,6], 刘锋[4], 雒建林[1,2,7], 李世亮[1,2,7], 郑国庆[1,8], 孟子杨[1], 梅佳伟[4,9,10], 石友国[1]
中文摘要：
我们报导新 kagome 量旋转液体候选人 Cu 3 Zn (哦)6 FBr，不经历任何阶段转变在下面到 50 mK，比 antiferromagnetic Curie-Weiss 温度低的超过三份订单(~ 200 K ) 。在低温度的清楚的差距开始在从 19 F 原子磁性的回声大小。我们观察为 fractionalized spin-1/2 spinon 刺激期望的差距的典型磁场依赖。我们的试验性的结果在一个拓扑地订的旋转系统为旋转 fractionalization 提供坚挺的证据，类似于处于部分量霍尔状态的起诉 fractionalization。
英文摘要：
We report a new kagome quantum spin liquid candidate CuaZn（OH）6FBr, which does not experience any phase transition down to 50inK, more than three orders lower than the antiferromagnetic Curie-Weiss temperature （-200 K）. 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 fraetionalization in the fractional quantum Hall state.
同期刊论文项目
位置：