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(hoho4@snu.ac.kr) ; Ma, Jie(jma@sjtu.edu.cn) ; Park, Je-Geun(jgpark10@snu.ac.kr)
	2022-01-26
发表期刊	JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN	0953-8984
卷号	34 期号:4 页码:11
摘要	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
资助者	Leading Researcher Program of the National Research Foundation of Korea
DOI	10.1088/1361-648X/ac2644
收录类别	SCI
语种	英语
资助项目	Leading Researcher Program of the National Research Foundation of Korea[2020R1A3B2079375]
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000717254900001
出版者	IOP Publishing Ltd
引用统计	被引频次：41[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/167212
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.Seoul Natl Univ, Ctr Quantum Mat, Seoul 08826, South Korea 2.Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea 3.Inst for Basic Sci Korea, Ctr Correlated Electron Syst, Seoul 08826, South Korea 4.Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Artificial Struct & Quantum Control, Shanghai 200240, Peoples R China 5.Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan 6.High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan 7.Kangwon Natl Univ, Dept Phys, Chunchon 24311, South Korea 8.Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA 9.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R 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,2022,34(4):11.
APA	Kim, Chaebin.,Jeong, Jaehong.,Lin, Gaoting.,Park, Pyeongjae.,Masuda, Takatsugu.,...&Park, Je-Geun.(2022).Antiferromagnetic Kitaev interaction inJ (eff)=1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6.JOURNAL OF PHYSICS-CONDENSED MATTER,34(4),11.
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(2022):11.