Knowledge Management System of Institute of Theoretical Physics, CAS
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
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| Strong-coupling superconductivity in the nickel-based oxypnictide LaNiAsO(1-x)F(x) | |
| Source Publication | PHYSICAL REVIEW B
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| Keyword | Layered Superconductor Heat Measurements Low-temperature Instability Field |
| Abstract | 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 | |
| ISSN | 1098-0121 |
| Volume | 78Issue:6Pages:- |
| Subject Area | Physics |
| Indexed By | SCI |
| Funding Organization | 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] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/5487 |
| Collection | SCI期刊论文 |
| Corresponding Author | Li, 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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