Coupled magnetic and structural transition in topological antiferromagnet EuAgAs under high pressure | |
Zhang, Zhuyi6,7; Chen, Xuliang6,7; An, Chao5; Wang, Shuyang7; Zhang, Lili4; Zhou, Yonghui6,7; Zhang, Min5; Zhou, Jian2,3; Yang, Zhaorong1,5,6,7 | |
刊名 | MATERIALS TODAY PHYSICS |
2023-11-01 | |
卷号 | 38 |
关键词 | Topological antiferromagnet High pressure Magnetoresistance Phase transition Marginal fermi-liquid state |
ISSN号 | 2542-5293 |
DOI | 10.1016/j.mtphys.2023.101228 |
通讯作者 | Chen, Xuliang(xlchen@hmfl.ac.cn) ; Yang, Zhaorong(zryang@issp.ac.cn) |
英文摘要 | Recently, EuAgAs and its derivatives have emerged as a promising platform for studying the interplay of transports, magnetism and topology. Herein, we report construction of a temperature-pressure phase diagram for antiferromagnetic Dirac semimetal EuAgAs, through electrical transport, synchrotron x-ray diffraction and Raman spectroscopy measurements in diamond anvil cells at high pressures up to 48.6 GPa. At Pc1-3-5 GPa, we found a pressure-induced magnetic phase transition with accompanying a structural P63/mmc -> Pnma transition. In the pristine antiferromagnetic phase, negative colossal magnetoresistance is observed mainly below the Ne ' el temperature TN along with a field-induced metamagnetic transition; in the emergent magnetic phase, however, it is evident both above and below the magnetic critical temperature TC yet with no field-induced metamagnetic transition. These distinct features lead us to argue a ferromagnetic-like state for EuAgAs above Pc1, which is further supported by observation of a T5/3 temperature dependence of low-temperature resistance, a characteristic of marginal Fermi-liquid state expected to exist close to a ferromagnetic instability by spin fluctuations in metallic ferromagnets. At Pc2-20 GPa, a possible phase transition of electronic origin may take place, which is revealed jointly by change of a T5/3 -> T5/2 temperature dependence of low-temperature resistance and change in slope of linear-in-T resistance at high temperatures. |
资助项目 | National Key Research and Development Program of China[2022YFA1602603] ; National Natural Science Foundation of China[12174395] ; National Natural Science Foundation of China[12004004] ; Users with Excellence Project of Hefei Center CAS[2021HSC-UE008] ; Youth Innovation Promotion Association CAS[2020443] |
WOS关键词 | TOTAL-ENERGY CALCULATIONS ; METAL ; SERIES |
WOS研究方向 | Materials Science ; Physics |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001075198600001 |
资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Users with Excellence Project of Hefei Center CAS ; Youth Innovation Promotion Association CAS |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/132634] |
专题 | 中国科学院合肥物质科学研究院 |
通讯作者 | Chen, Xuliang; Yang, Zhaorong |
作者单位 | 1.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China 3.Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China 4.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil SSRF, Shanghai 201204, Peoples R China 5.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China 6.Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Anhui, Peoples R China 7.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condit, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Zhuyi,Chen, Xuliang,An, Chao,et al. Coupled magnetic and structural transition in topological antiferromagnet EuAgAs under high pressure[J]. MATERIALS TODAY PHYSICS,2023,38. |
APA | Zhang, Zhuyi.,Chen, Xuliang.,An, Chao.,Wang, Shuyang.,Zhang, Lili.,...&Yang, Zhaorong.(2023).Coupled magnetic and structural transition in topological antiferromagnet EuAgAs under high pressure.MATERIALS TODAY PHYSICS,38. |
MLA | Zhang, Zhuyi,et al."Coupled magnetic and structural transition in topological antiferromagnet EuAgAs under high pressure".MATERIALS TODAY PHYSICS 38(2023). |
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