Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe2As2

doi:10.1088/1674-1056/25/4/047401

中国物理B ›› 2016, Vol. 25 ›› Issue (4): 47401-047401.doi: 10.1088/1674-1056/25/4/047401

所属专题： Virtual Special Topic — High temperature superconductivity

• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇下一篇

Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂

1 College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

收稿日期:2016-01-07 修回日期:2016-01-28 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: Hao Yang, Xiang-Gang Qiu E-mail:yanghao@nuaa.edu.cn;xgqiu@iphy.ac.cn
基金资助:
Project supported by the National Basic Research Program of China (Grant Nos. 2012CB821400, 2012CB921302, and 2015CB921303) and the National Natural Science Foundation of China (Grant Nos. 11274237, 91121004, 51228201, 11004238, and 11374011).

Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂

Wei Zhang(张威)^1,2, Yao-Min Dai(戴耀民)², Bing Xu(许兵)², Run Yang(杨润)², Jin-Yun Liu(刘金云)², Qiang-Tao Sui(随强涛)², Hui-Qian Luo(罗会仟)², Rui Zhang(张睿)², Xing-Ye Lu(鲁兴业)², Hao Yang(杨浩)³, Xiang-Gang Qiu(邱祥冈)²

1 College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Received:2016-01-07 Revised:2016-01-28 Online:2016-04-05 Published:2016-04-05
Contact: Hao Yang, Xiang-Gang Qiu E-mail:yanghao@nuaa.edu.cn;xgqiu@iphy.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant Nos. 2012CB821400, 2012CB921302, and 2015CB921303) and the National Natural Science Foundation of China (Grant Nos. 11274237, 91121004, 51228201, 11004238, and 11374011).

摘要/Abstract

摘要：

We present magnetotransport studies on a series of BaFe_2-xNi_xAs₂ (0.03≤ x ≤ 0.10) single crystals. In the underdoped (x = 0.03) non-superconducting sample, the temperature-dependent resistivity exhibits a peak at 22 K, which is associated with the onset of filamentary superconductivity (FLSC). FLSC is suppressed by an external magnetic field in a manner similar to the suppression of bulk superconductivity in an optimally-doped (x=0.10) compound, suggesting the same possible origin as the bulk superconductivity. Our magnetoresistivity measurements reveal that FLSC persists up to the optimal doping and disappears in the overdoped regime where the long-range antiferromagnetic order is completely suppressed, pointing to a close relation between FLSC and the magnetic order.

关键词: iron-based pnictide, magnetoresistivity, filamentary superconductivity

Abstract:

Key words: iron-based pnictide, magnetoresistivity, filamentary superconductivity

中图分类号: (Superconductivity phase diagrams)

74.25.Dw

74.25.F- (Transport properties) 74.70.Xa (Pnictides and chalcogenides) 74.81.-g (Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities)

张威, 戴耀民, 许兵, 杨润, 刘金云, 随强涛, 罗会仟, 张睿, 鲁兴业, 杨浩, 邱祥冈. Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂[J]. 中国物理B, 2016, 25(4): 47401-047401.

Wei Zhang(张威), Yao-Min Dai(戴耀民), Bing Xu(许兵), Run Yang(杨润), Jin-Yun Liu(刘金云), Qiang-Tao Sui(随强涛), Hui-Qian Luo(罗会仟), Rui Zhang(张睿), Xing-Ye Lu(鲁兴业), Hao Yang(杨浩), Xiang-Gang Qiu(邱祥冈). Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂[J]. Chin. Phys. B, 2016, 25(4): 47401-047401.

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Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂

Magnetoresistivity and filamentary superconductivity in nickel-doped BaFe₂As₂

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