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Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x)
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
2008
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号78期号:6页码:-
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.
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
关键词Layered Superconductor Heat Measurements Low-temperature Instability Field
学科领域Physics
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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收录类别SCI
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]
WOS记录号WOS:000259264900010
引用统计
被引频次:75[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1978-2010年知识产出
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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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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