Nodeless superconductivity of single-crystalline KxFe2-ySe2 revealed by the low-temperature specific heat
文献类型：期刊论文
| 作者 | Zeng, B ; Shen, B ; Chen, GF ; He, JB ; Wang, DM ; Li, CH ; Wen, HH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:14 |
| 关键词 | D-WAVE SUPERCONDUCTORS LAYERED SUPERCONDUCTOR (LA1.85SR0.15)CUO4 YBA2CU3O7-DELTA STATE GAP |
| ISSN号 | 1098-0121 |
| 通讯作者 | Zeng, B (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | Low-temperature specific heat (SH) has been measured in KxFe2-ySe2 single crystals with T-c = 32 K. The SH anomaly associated with the superconducting transition is moderate and sharp, yielding a value of Delta C/T vertical bar T-c = 11.6 +/- 1.0 mJ/mol K-2. The residual SH coefficient gamma(0) in the superconducting state at T -> 0 is very small with a value of about 0.39 mJ/mol K-2. The magnetic-field-induced enhancement of the low-T SH exhibits a rough linear feature indicating a nodeless gap. This is further supported by the scaling based on the nodeless-gap approach of the low-T data at different magnetic fields. A rough estimate indicates that the normal-state SH coefficient gamma(n) is about 6 +/- 0.5 mJ/mol K-2, leading to Delta C/gamma T-n vertical bar T-c = 1.93 and placing this superconductor in the strong coupling region. |
| 收录类别 | SCI |
| 资助信息 | NSF of China; Ministry of Science and Technology of China [2011CBA001000]; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/49929]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zeng, B,Shen, B,Chen, GF,et al. Nodeless superconductivity of single-crystalline KxFe2-ySe2 revealed by the low-temperature specific heat[J]. PHYSICAL REVIEW B,2011,83(14). |
| APA | Zeng, B.,Shen, B.,Chen, GF.,He, JB.,Wang, DM.,...&Wen, HH.(2011).Nodeless superconductivity of single-crystalline KxFe2-ySe2 revealed by the low-temperature specific heat.PHYSICAL REVIEW B,83(14). |
| MLA | Zeng, B,et al."Nodeless superconductivity of single-crystalline KxFe2-ySe2 revealed by the low-temperature specific heat".PHYSICAL REVIEW B 83.14(2011). |
入库方式： OAI收割
来源：物理研究所
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