ITP OpenIR  > SCI期刊论文
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)
Source PublicationPHYSICAL REVIEW B
KeywordLayered Superconductor Heat Measurements Low-temperature Instability Field
AbstractA 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
Volume78Issue:6Pages:-
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSF 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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Cited Times:76[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5487
CollectionSCI期刊论文
Corresponding AuthorLi, Z , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
Recommended Citation
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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