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Incommensurate magnetic order in an axion insulator candidate EuIn2As2 investigated by NMR measurement

文献类型：期刊论文

作者Takeda, Hikaru5; Yan, Jian5; Jiang, Zhongzhu1,2; Luo, Xuan1; Sun, Yuping1,3,4; Yamashita, Minoru5
刊名NPJ QUANTUM MATERIALS
出版日期2024-09-12
卷号9
DOI10.1038/s41535-024-00680-0
通讯作者Takeda, Hikaru(takeda.hikaru@issp.u-tokyo.ac.jp)
英文摘要Magnetic topological insulators exhibit unique electronic states due to the interplay between the electronic topology and the spin structure. The antiferromagnetic metal EuIn2As2 is a prominent candidate material in which exotic topological phases, including an axion insulating state, are theoretically predicted depending on the magnetic structure of the Eu2+ moments. Here, we report experimental results of the nuclear magnetic resonance (NMR) measurements of all the nuclei in EuIn2As2 to investigate the coupling between the magnetic moments in the Eu ions and the conduction electrons in In2As2 layers and the magnetic structure. The As-75 and In-115 NMR spectra observed at zero external magnetic fields reveal the appearance of internal fields of 4.9 and 3.6 T, respectively, at the lowest temperature, suggesting a strong coupling between the conduction electrons in the In2As2 layer and the ordered magnetic moments in the Eu ions. The As-75 NMR spectra under in-plane external magnetic fields show broad distributions of the internal fields produced by an incommensurate fan-like spin structure which turns into a forced ferromagnetic state above 0.7 T. We propose a spin reorientation process that an incommensurate helical state at zero external magnetic field quickly changes into a fan state by applying a slight magnetic field.
资助项目JSPS KAKENHI[JP22KF0111] ; JSPS KAKENHI[JP23H01116] ; National Key RD Program[2023YFA1607402] ; National Key RD Program[2021YFA1600201] ; National Natural Science Foundation of China[U2032215] ; National Natural Science Foundation of China[U1932217] ; National Natural Science Foundation of China[12274412] ; Systematic Fundamental Research Program Leveraging Major Scientific and Technological Infrastructure, Chinese Academy of Sciences[JZHKYPT-2021-08]
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:001312813000002
出版者NATURE PORTFOLIO
资助机构JSPS KAKENHI ; National Key RD Program ; National Natural Science Foundation of China ; Systematic Fundamental Research Program Leveraging Major Scientific and Technological Infrastructure, Chinese Academy of Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135218]  
专题中国科学院合肥物质科学研究院
通讯作者Takeda, Hikaru
作者单位1.Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, HFIPS, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Anhui Prov Key Lab Low Energy Quantum Mat & Device, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China
4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
5.Univ Tokyo, Inst Solid State Phys, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778581, Japan
推荐引用方式
GB/T 7714		 Takeda, Hikaru,Yan, Jian,Jiang, Zhongzhu,et al. Incommensurate magnetic order in an axion insulator candidate EuIn2As2 investigated by NMR measurement[J]. NPJ QUANTUM MATERIALS,2024,9.
APA Takeda, Hikaru,Yan, Jian,Jiang, Zhongzhu,Luo, Xuan,Sun, Yuping,&Yamashita, Minoru.(2024).Incommensurate magnetic order in an axion insulator candidate EuIn2As2 investigated by NMR measurement.NPJ QUANTUM MATERIALS,9.
MLA Takeda, Hikaru,et al."Incommensurate magnetic order in an axion insulator candidate EuIn2As2 investigated by NMR measurement".NPJ QUANTUM MATERIALS 9(2024).

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来源：合肥物质科学研究院

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