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

doi:10.1103/PhysRevB.104.L140504

HFCAS OpenIR

	Disorder-robust high-field superconducting phase of FeSe single crystals
	Zhou, Nan1,2,3,4 ; Sun, Yue 1,2,5; 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; Meng, Y.1,2; Yi, X. L.1,2; Pi, L.3 ; Tamegai, T.6; Xing, Xiangzhuo 1,2; Shi, Zhixiang 1,2
	2021-10-18
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
通讯作者	Sun, Yue(sunyue@phys.aoyama.ac.jp) ; Xing, Xiangzhuo(xzxing@seu.edu.cn) ; Shi, Zhixiang(zxshi@seu.edu.cn)
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.
DOI	10.1103/PhysRevB.104.L140504
关键词[WOS]	IMPURITIES ; 2-BAND ; STATE
收录类别	SCI
语种	英语
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]
项目资助者	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
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000708656800005
出版者	AMER PHYSICAL SOC
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/125606
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).