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Monoclinic EuSn2As2: A Novel High-Pressure Network Structure

文献类型：期刊论文

作者Zhao, Lin2,3,4; Yi, Changjiang2,3; Wang, Chang-Tian1,2,3; Chi, Zhenhua5; Yin, Yunyu2,3; Ma, Xiaoli2,3; Dai, Jianhong2,3; Yang, Pengtao2,3; Yue, Binbin6; Cheng, Jinguang2,3
刊名PHYSICAL REVIEW LETTERS
出版日期2021-04-13
卷号126
ISSN号0031-9007
DOI10.1103/PhysRevLett.126.155701
通讯作者Wang, Jian-Tao(wjt@aphy.iphy.ac.cn) ; Han, Yonghao(hanyh@jlu.edu.cn) ; Shi, Youguo(ygshi@iphy.ac.cn) ; Yu, Xiaohui(yuxh@iphy.ac.cn)
英文摘要The layered crystal of EuSn2As2 has a Bi2Te3-type structure in rhombohedral (R (3) over barm) symmetry and has been confirmed to be an intrinsic magnetic topological insulator at ambient conditions. Combining ab initio calculations and in situ x-ray diffraction measurements, we identify a new monoclinic EuSn2As2 structure in C2/m symmetry above similar to 14 GPa. It has a three-dimensional network made up of honeycomblike Sn sheets and zigzag As chains, transformed from the layered EuSn2As2 via a two-stage reconstruction mechanism with the connecting of Sn-Sn and As-As atoms successively between the buckled SnAs layers. Its dynamic structural stability has been verified by phonon mode analysis. Electrical resistance measurements reveal an insulator-metal-superconductor transition at low temperature around 5 and 15 GPa, respectively, according to the structural conversion, and the superconductivity with a T-C value of similar to 4 K is observed up to 30.8 GPa. These results establish a high-pressure EuSn2As2 phase with intriguing structural and electronic properties and expand our understandings about the layered magnetic topological insulators.
WOS关键词TOPOLOGICAL INSULATORS ; CANDIDATE ; SUPERCONDUCTIVITY ; DEPENDENCE ; TRANSITION ; SB2TE3 ; BI2TE3 ; SN
资助项目National Key R&D Program of China[2016YFA0401503] ; National Key R&D Program of China[2016YFA0300604] ; National Key R&D Program of China[2018YFA0305700] ; National Key R&D Program of China[2018YFA0305900] ; National Key R&D Program of China[2020YFA0711502] ; National Natural Science Foundation of China[11974387] ; National Natural Science Foundation of China[12004416] ; National Natural Science Foundation of China[11674328] ; National Natural Science Foundation of China[U2032204] ; National Natural Science Foundation of China[11774126] ; National Natural Science Foundation of China[12004014] ; National Natural Science Foundation of China[U1832123] ; National Natural Science Foundation of China[U1930401] ; Strategic Priority Research Program of Frontier Sciences of the Chinese Academy of Sciences[XDB33000000] ; Strategic Priority Research Program of Frontier Sciences of the Chinese Academy of Sciences[XDB25000000] ; Strategic Priority Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDBSSW-SLH013] ; K. C. Wong Education Foundation[GJTD-2018-01] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2016006] ; Chinese Academy of Sciences[KJCX2SWN20] ; Chinese Academy of Sciences[KJCX2-SW-N03] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[XDB33000000] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[XDB25000000] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDBSSW-SLH013]
WOS研究方向Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000652828300006
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Frontier Sciences of the Chinese Academy of Sciences ; K. C. Wong Education Foundation ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123672]  
专题中国科学院合肥物质科学研究院
通讯作者Wang, Jian-Tao; Han, Yonghao; Shi, Youguo; Yu, Xiaohui
作者单位1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China
6.Ctr High Pressure Sci & Technol Adv Res, Beijing 100094, Peoples R China
7.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
8.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Lin,Yi, Changjiang,Wang, Chang-Tian,et al. Monoclinic EuSn2As2: A Novel High-Pressure Network Structure[J]. PHYSICAL REVIEW LETTERS,2021,126.
APA Zhao, Lin.,Yi, Changjiang.,Wang, Chang-Tian.,Chi, Zhenhua.,Yin, Yunyu.,...&Yu, Xiaohui.(2021).Monoclinic EuSn2As2: A Novel High-Pressure Network Structure.PHYSICAL REVIEW LETTERS,126.
MLA Zhao, Lin,et al."Monoclinic EuSn2As2: A Novel High-Pressure Network Structure".PHYSICAL REVIEW LETTERS 126(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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