Unconventional Anisotropic s-Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor
文献类型：期刊论文
| 作者 | Umezawa, K ; Li, Y ; Miao, H ; Nakayama, K ; Liu, ZH ; Richard, P ; Sato, T ; He, JB ; Wang, DM ; Chen, GF ; Ding, H ; Takahashi, T ; Wang, SC |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2012 |
| 卷号 | 108期号:3 |
| 关键词 | RESOLVED PHOTOEMISSION-SPECTROSCOPY BA0.6K0.4FE2AS2 |
| ISSN号 | 0031-9007 |
| 通讯作者 | Umezawa, K (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan. |
| 中文摘要 | We have performed high-resolution angle-resolved photoemission spectroscopy on Fe-based superconductor LiFeAs (T-c = 18 K). We reveal multiple nodeless superconducting (SC) gaps with 2 Delta/k(B)T(c) ratios varying from 2.8 to 6.4, depending on the Fermi surface (FS). We also succeeded in directly observing a gap anisotropy along the FS with magnitude up to similar to 30%. The anisotropy is fourfold symmetric with an antiphase between the hole and electron FSs, suggesting complex anisotropic interactions for the SC pairing. The observed momentum dependence of the SC gap offers an excellent opportunity to investigate the underlying pairing mechanism. |
| 收录类别 | SCI |
| 资助信息 | JSPS; TRiP-JST; CREST-JST; MEXT of Japan; NSFC; Chinese Academy of Sciences; NSF; Ministry of Science and Technology of China |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46381]  |
| 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 | Umezawa, K,Li, Y,Miao, H,et al. Unconventional Anisotropic s-Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor[J]. PHYSICAL REVIEW LETTERS,2012,108(3). |
| APA | Umezawa, K.,Li, Y.,Miao, H.,Nakayama, K.,Liu, ZH.,...&Wang, SC.(2012).Unconventional Anisotropic s-Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor.PHYSICAL REVIEW LETTERS,108(3). |
| MLA | Umezawa, K,et al."Unconventional Anisotropic s-Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor".PHYSICAL REVIEW LETTERS 108.3(2012). |
入库方式： OAI收割
来源：物理研究所
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