Gapped Spin-1/2 Spinon Excitations in a New Kagome Quantum Spin Liquid Compound Cu3Zn(OH)6FBr

被引：0

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 ^{[9
,4
,10
]}

石友国 ^{[1
]}

机构：

[1] Beijing Computational Science Research Center

[2] Institute of Physics, Chinese Academy of Sciences

[3] School of Physical Sciences, University of Chinese Academy of Sciences

[4] State Key Laboratory of Surface Physics, Department of Physics, and Laboratory of Advanced Materials, Fudan University

[5] Department of Materials Science and Engineering, University of Utah

[6] Institute for Advanced Study,Tsinghua University

[7] Collaborative Innovation Center of Advanced Microstructures

[8] Collaborative Innovation Center of Quantum Matter

[9] Department of Physics, Okayama University

[10] Institute for Quantum Science and Engineering, and Department of Physics, Southern University of Science and Technology

来源：

Chinese Physics Letters | 2017年 / 34卷 / 07期

基金：

中国国家自然科学基金;

关键词：

OH; Gapped Spin-1/2 Spinon Excitations in a New Kagome Quantum Spin Liquid Compound Cu3Zn; Cu;

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：

We report a new kagome quantum spin liquid candidate CuZn(OH)FBr, which does not experience any phase transition down to 50 mK, 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 fromF 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.

引用

页码：257 / 266

页数：10

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