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题名: Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x)
作者: Li, Zheng ;  Chen, Gengfu ;  Dong, Jing ;  Li, Gang ;  Hu, Wanzheng ;  Wu, Dan ;  Su, Shaokui ;  Zheng, Ping ;  Xiang, Tao ;  Wang, Nanlin ;  Luo, Jianlin
刊名: PHYSICAL REVIEW B
出版日期: 2008
卷号: 78, 期号:6, 页码:-
关键词: LAYERED SUPERCONDUCTOR ;  HEAT MEASUREMENTS ;  LOW-TEMPERATURE ;  INSTABILITY ;  FIELD
学科分类: Physics
通讯作者: Li, Z , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
部门归属: [Li, Z; Chen, GF; Dong, J; Li, G; Hu, WZ; Wu, D; Su, SK; Zheng, P; Xiang, T; Wang, NL; Luo, JL] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China; [Xiang, T] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: A series of layered nickel-based LaNiAsO(1-x)F(x) compounds with x=0-0.15 are synthesized by solid-state reactions. The pure LaNiAsO exhibits bulk superconductivity with T(c)similar to 2.75 K. Partial substitution of oxygen with fluorine increases the transition temperature to similar to 3.8 K. The LaNiAsO(0.9)F(0.1) sample shows a sharp superconducting transition and a sharp specific-heat jump at the critical temperature. The magnitude of the specific-heat jump is much larger than that expected from the weak-coupling BCS theory, indicating that this superconductor is in the strong-coupling regime. Furthermore, the temperature dependence of the specific heat deviates strongly from the theoretical result for the single-band s- or d-wave superconductor but shows a characteristic feature of multigap.
资助者: NSF of China; Chinese Academy of Sciences; MOST, China[973]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000259264900010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5487
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, Zheng,Chen, Gengfu,Dong, Jing,et al. Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x)[J]. PHYSICAL REVIEW B,2008,78(6):-.
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