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

文献类型：期刊论文

作者Yu, Yi1; Wang, Chunchang1; Li, Qiuju1; Wang, Hong1; Zhang, Changjin2,3
刊名SUPERCONDUCTOR SCIENCE & TECHNOLOGY
出版日期2017-08-01
卷号30期号:8
关键词Iron-based Superconductors Vortex Dynamics Vortex-glass Flux Creep
DOI10.1088/1361-6668/aa73a8
文献子类Article
英文摘要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.
WOS关键词THIN-FILMS ; SUPERCONDUCTIVITY ; CREEP
WOS研究方向Physics
语种英语
WOS记录号WOS:000405068500005
资助机构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) ; 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)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33440]  
专题合肥物质科学研究院_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).

入库方式： OAI收割

来源：合肥物质科学研究院

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