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Li, Zheng; Chen, Gengfu; Dong, Jing; Li, Gang; Hu, Wanzheng; Wu, Dan; Su, Shaokui; Zheng, Ping; Xiang, Tao; Wang, Nanlin; Luo, Jianlin; Li, Z , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x)
发表期刊PHYSICAL REVIEW B
关键词Layered Superconductor Heat Measurements Low-temperature Instability Field
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.
2008
ISSN1098-0121
卷号78期号:6页码:-
学科领域Physics
收录类别SCI
项目资助者NSF of China; Chinese Academy of Sciences; MOST, China[973] ; NSF of China; Chinese Academy of Sciences; MOST, China[973] ; NSF of China; Chinese Academy of Sciences; MOST, China[973] ; NSF of China; Chinese Academy of Sciences; MOST, China[973]
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被引频次:76[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5487
专题理论物理所科研产出_SCI论文
通讯作者Li, Z , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
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GB/T 7714
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):-.
APA Li, Zheng.,Chen, Gengfu.,Dong, Jing.,Li, Gang.,Hu, Wanzheng.,...&Li, Z , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.(2008).Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x).PHYSICAL REVIEW B,78(6),-.
MLA Li, Zheng,et al."Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x)".PHYSICAL REVIEW B 78.6(2008):-.
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