Thermally activated transport and vortex-glass phase transition of K0.78Fe1.70Se2 single crystals

doi:10.1088/1361-6668/aa73a8

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	Thermally activated transport and vortex-glass phase transition of K0.78Fe1.70Se2 single crystals
	Yu, Yi 1; Wang, Chunchang 1; Li, Qiuju 1; Wang, Hong 1; Zhang, Changjin2,3
	2017-08-01
发表期刊	SUPERCONDUCTOR SCIENCE & TECHNOLOGY
摘要	The transport property (rho - T) and flux motion together with the superconductivity of K-0.78 Fe-1.70 Se-2 single crystals are studied. In the transport measurement, contrasting behavior is observed under two different magnetic field orientations, i.e., H-//c - axis and H-perpendicular to c - axis, which is ascribed to different vortex configurations. In the flux motion study, the tail of the r - T well fits the description of the vortex-glass (VG) critical behavior, which is confirmed by VG scaling. The strong pinning nature of K0.78Fe1.70Se2 implies great sustainability under high magnetic fields and the potential for practical application of the system. The rho - T relation under T-c follows Arrhenius thermally activated flux flow (TAFF) behavior. The existence of a crossover behavior in a magnetic field is discovered via the magnetic dependence of the effective pinning barrier, which is related to the change in pinning strength of the point defects and the entanglements of the flux lines. Finally, a vortex phase diagram is proposed based on the evolution of upper critical field and other dynamic characteristics.
文章类型	Article
关键词	Iron-based Superconductors Vortex Dynamics Vortex-glass Flux Creep
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1088/1361-6668/aa73a8
关键词[WOS]	THIN-FILMS ; SUPERCONDUCTIVITY ; CREEP
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; National Natural Science Foundation of China (NSFC)(11404002 ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; Scientific Research Foundation for the Returned Overseas Chinese Scholars from the State Education Ministry ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; '211 Project' of Anhui University(J01001319-J10113190007) ; 11404003 ; 11404003 ; 11404003 ; 11404003 ; 11404003 ; 11404003 ; 11404003 ; 11404003 ; 11074001) ; 11074001) ; 11074001) ; 11074001) ; 11074001) ; 11074001) ; 11074001) ; 11074001)
WOS研究方向	Physics
WOS类目	Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000405068500005
引用统计	被引频次：9[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/334002/33440
专题	中科院强磁场科学中心
作者单位	1.Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China 2.Chinese Acad Sci, High Magnet Field Lab, Hefei 230026, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Yu, Yi,Wang, Chunchang,Li, Qiuju,et al. Thermally activated transport and vortex-glass phase transition of K0.78Fe1.70Se2 single crystals[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2017,30(8).
APA	Yu, Yi,Wang, Chunchang,Li, Qiuju,Wang, Hong,&Zhang, Changjin.(2017).Thermally activated transport and vortex-glass phase transition of K0.78Fe1.70Se2 single crystals.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,30(8).
MLA	Yu, Yi,et al."Thermally activated transport and vortex-glass phase transition of K0.78Fe1.70Se2 single crystals".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 30.8(2017).