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Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe2

文献类型：期刊论文

作者Liu, Weiwei3,4,5; Zheng, Zheng4,5; Yan, Dayu4,5; Li, Jianshu4,5; Zhang, Zhitao1; Ji, Jianting4,5; Jin, Feng4,5; Shi, Youguo4,5; Zhang, Qingming2,4,5
刊名CHINESE PHYSICS LETTERS
出版日期2024-09-01
卷号41
ISSN号0256-307X
DOI10.1088/0256-307X/41/9/097503
通讯作者Zheng, Zheng(zhangzheng@iphy.ac.cn)
英文摘要After the discovery of the ARECh(2) (A = alkali or monovalent ions, RE = rare-earth, Ch = chalcogen) triangular lattice quantum spin liquid (QSL) family, a series of its oxide, sulfide, and selenide counterparts has been consistently reported and extensively investigated. While KErTe(2 )represents the initial synthesized telluride member, preserving its triangular spin lattice, it was anticipated that the substantial tellurium ions could impart more pronounced magnetic attributes and electronic structures to this material class. This study delves into the magnetism of KErTe(2 )at finite temperatures through magnetization and electron spin resonance (ESR) measurements. Based on the angular momentum J<^> after spin-orbit coupling (SOC) and symmetry analysis, we obtain the magnetic effective Hamiltonian to describe the magnetism of Er3+ in R3m space group. Applying the mean-field approximation to the Hamiltonian, we can simulate the magnetization and magnetic heat capacity of KErTe(2 )in paramagnetic state and determine the crystalline electric field (CEF) parameters and partial exchange interactions. The relatively narrow energy gaps between the CEF ground state and excited states exert a significant influence on the magnetism. For example, small CEF excitations can result in a significant broadening of the ESR linewidth at 2 K. For the fitted exchange interactions, although the values are small, given a large angular momentum J = 15/2 after SOC, they still have a noticeable effect at finite temperatures. Notably, the heat capacity data under different magnetic fields along the c axis direction also roughly match our calculated results, further validating the reliability of our analytical approach. These derived parameters serve as crucial tools for future investigations into the ground state magnetism of KErTe2. The findings presented herein lay a foundation for exploration of the intricate magnetism within the triangular-lattice delafossite family.
WOS关键词STATE
资助项目National Science Foundation of China[U1932215] ; National Science Foundation of China[12274186] ; National Key Research and Development Program of China[2022YFA1402704] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB33010100] ; Synergetic Extreme Condition User Facility (SECUF)
WOS研究方向Physics
语种英语
WOS记录号WOS:001330705500001
出版者IOP Publishing Ltd
资助机构National Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Synergetic Extreme Condition User Facility (SECUF)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/134545]  
专题中国科学院合肥物质科学研究院
通讯作者Zheng, Zheng
作者单位1.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme C, High Magnet Field Lab, Hefei 230031, Peoples R China
2.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
3.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Weiwei,Zheng, Zheng,Yan, Dayu,et al. Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe2[J]. CHINESE PHYSICS LETTERS,2024,41.
APA Liu, Weiwei.,Zheng, Zheng.,Yan, Dayu.,Li, Jianshu.,Zhang, Zhitao.,...&Zhang, Qingming.(2024).Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe2.CHINESE PHYSICS LETTERS,41.
MLA Liu, Weiwei,et al."Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe2".CHINESE PHYSICS LETTERS 41(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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