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Disorder-robust high-field superconducting phase of FeSe single crystals

文献类型：期刊论文

作者Zhou, Nan1,2,3,4; Sun, Yue1,2,5; Xi, C. Y.3; Wang, Z. S.3; Zhang, J. L.3; Zhang, Y.3; Zhang, Y. F.1,2; Xu, C. Q.1,2; Pan, Y. Q.1,2; Feng, J. J.1,2
刊名PHYSICAL REVIEW B
出版日期2021-10-18
卷号104
ISSN号2469-9950
DOI10.1103/PhysRevB.104.L140504
通讯作者Sun, Yue(sunyue@phys.aoyama.ac.jp) ; Xing, Xiangzhuo(xzxing@seu.edu.cn) ; Shi, Zhixiang(zxshi@seu.edu.cn)
英文摘要When exposed to high magnetic fields, certain materials manifest an exotic superconducting (SC) phase that has attracted considerable attention. A proposed explanation for the origin of the high-field SC phase is the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. This state is characterized by inhomogeneous superconductivity, where the Cooper pairs have finite center-of-mass momenta. Recently, the high-field SC phase was observed in FeSe, and it was deemed to originate from the FFLO state. Here, we synthesize FeSe single crystals with different levels of disorder. The level of disorder is expressed by the ratio of the mean free path to the coherence length and ranges between 35 and 1.2. The upper critical field B-c2 was obtained by both resistivity and magnetic torque measurements over a wide range of temperatures, which went as low as similar to 0.5 K, and magnetic fields, which went up to similar to 38 T along the c axis and in the ab plane. In the high-field region parallel to the ab plane, an unusual SC phase was confirmed in all the crystals, and the phase was found to be robust against disorder. This result suggests that the high-field SC phase in FeSe is not a conventional FFLO state.
WOS关键词IMPURITIES ; 2-BAND ; STATE
资助项目High Magnetic Field Laboratory of Anhui Province ; National Key R&D Program of China[2018YFA0704300] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB25000000] ; National Natural Science Foundation of China[U1932217] ; National Natural Science Foundation of China[11674054] ; National Natural Science Foundation of China[11874359] ; China Postdoctoral Science Foundation[2019M661679] ; JSPS KAKENHI[JP20H05164] ; JSPS KAKENHI[JP19K14661] ; JSPS KAKENHI[JP17H01141]
WOS研究方向Materials Science ; Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000708656800005
资助机构High Magnetic Field Laboratory of Anhui Province ; National Key R&D Program of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; JSPS KAKENHI
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/125605]  
专题中国科学院合肥物质科学研究院
通讯作者Sun, Yue; Xing, Xiangzhuo; Shi, Zhixiang
作者单位1.Southeast Univ, Minist Educ, Sch Phys, Nanjing 211189, Peoples R China
2.Southeast Univ, Minist Educ, Key Lab MEMS, Nanjing 211189, Peoples R China
3.Chinese Acad Sci, High Magnet Field Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Peoples R China
4.Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
5.Aoyama Gaguin Univ, Dept Phys & Math, Sagamihara, Kanagawa 2525258, Japan
6.Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
推荐引用方式
GB/T 7714		 Zhou, Nan,Sun, Yue,Xi, C. Y.,et al. Disorder-robust high-field superconducting phase of FeSe single crystals[J]. PHYSICAL REVIEW B,2021,104.
APA Zhou, Nan.,Sun, Yue.,Xi, C. Y..,Wang, Z. S..,Zhang, J. L..,...&Shi, Zhixiang.(2021).Disorder-robust high-field superconducting phase of FeSe single crystals.PHYSICAL REVIEW B,104.
MLA Zhou, Nan,et al."Disorder-robust high-field superconducting phase of FeSe single crystals".PHYSICAL REVIEW B 104(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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