Antiferromagnetic Kitaev interaction inJ               eff                = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6

doi:10.1088/1361-648X/ac2644

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	Antiferromagnetic Kitaev interaction inJ eff = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6
	Kim,Chaebin 1,2; Jeong,Jaehong 2,3; Lin,Gaoting 4; Park,Pyeongjae 1,2; Masuda,Takatsugu 5; Asai,Shinichiro 5; Itoh,Shinichi 6; Kim,Heung-Sik 7; Zhou,Haidong 8; Ma,Jie 4,9; Park,Je-Geun 1,2
通讯作者	Jeong,Jaehong() ; Ma,Jie() ; Park,Je-Geun()
	2021-11-11
发表期刊	Journal of Physics: Condensed Matter
ISSN	0953-8984
卷号	34 期号:4
摘要	Abstract Finding new materials with antiferromagnetic (AFM) Kitaev interaction is an urgent issue for quantum magnetism research. We conclude that Na3Co2SbO6 and Na2Co2TeO6 are new honeycomb cobalt-based systems with AFM Kitaev interaction by carrying out inelastic neutron scattering experiments and subsequent analysis. The spin–orbit excitons observed at 20–28 meV in both compounds strongly support the idea that Co2+ ions of both compounds have a spin-orbital entangled J eff = 1/2 state. Furthermore, we found that a generalized Kitaev–Heisenberg Hamiltonian can describe the spin-wave excitations of both compounds with additional 3rd nearest-neighbor interaction. Our best-fit parameters show significant AFM Kitaev terms and off-diagonal symmetric anisotropy terms of a similar magnitude in both compounds. We also found a strong magnon-damping effect at the higher energy part of the spin waves, entirely consistent with observations in other Kitaev magnets. Our work suggests Na3Co2SbO6 and Na2Co2TeO6 as rare examples of the AFM Kitaev magnets based on the systematic studies of the spin waves and analysis.
关键词	Kitaev model magnetism spin–orbit entanglement quantum spin liquid
DOI	10.1088/1361-648X/ac2644
语种	英语
WOS记录号	IOP:cm_34_4_045802
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/167385
专题	中国科学院金属研究所
通讯作者	Jeong,Jaehong; Ma,Jie; Park,Je-Geun
作者单位	1.Center for Quantum Materials, Seoul National University, Seoul 08826, Republic of Korea 2.Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea 3.Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea 4.Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China 5.Institute for Solid State Physics, The University of Tokyo, Chiba 277-8581, Japan 6.Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan 7.Department of Physics, Kangwon National University, Chuncheon 24311, Republic of Korea 8.Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, United States of America 9.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, People’s Republic of China
推荐引用方式 GB/T 7714	Kim,Chaebin,Jeong,Jaehong,Lin,Gaoting,et al. Antiferromagnetic Kitaev interaction inJ eff = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6[J]. Journal of Physics: Condensed Matter,2021,34(4).
APA	Kim,Chaebin.,Jeong,Jaehong.,Lin,Gaoting.,Park,Pyeongjae.,Masuda,Takatsugu.,...&Park,Je-Geun.(2021).Antiferromagnetic Kitaev interaction inJ eff = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6.Journal of Physics: Condensed Matter,34(4).
MLA	Kim,Chaebin,et al."Antiferromagnetic Kitaev interaction inJ eff = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6".Journal of Physics: Condensed Matter 34.4(2021).