Unconventional superconducting gap in NaFe0.95Co0.05As observed by angle-resolved photoemission spectroscopy
文献类型：期刊论文
| 作者 | Liu, ZH ; Richard, P ; Nakayama, K ; Chen, GF ; Dong, S ; He, JB ; Wang, DM ; Xia, TL ; Umezawa, K ; Kawahara, T ; Souma, S ; Sato, T ; Takahashi, T ; Qian, T ; Huang, YB ; Xu, N ; Shi, YB ; Ding, H ; Wang, SC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:6 |
| 关键词 | BA0.6K0.4FE2AS2 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Liu, ZH (reprint author), Renmin Univ, Dept Phys, Beijing 100872, Peoples R China. |
| 中文摘要 | We have performed high-resolution angle-resolved photoemission measurements on superconducting electron-doped NaFe0.95Co0.05As (T-c similar to 18 K). We observed a holelike Fermi surface around the zone center and two electronlike Fermi surfaces around the M point, which can be connected by the Q = (pi, pi) wave vector, suggesting that scattering over the near-nested Fermi surfaces is important in this 111 pnictide. Nearly isotropic superconducting gaps with sharp coherent peaks are observed below T-c on all three Fermi surfaces. Upon increasing temperature through T-c, the gap size shows little change while the coherence vanishes. Large ratios of 2 Lambda/k(B)T(c) similar to 8 are observed for all the bands, indicating a strong coupling in this system. These results are not expected from a classical phonon-mediated pairing mechanism. |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences [2010Y1JB6]; Ministry of Science and Technology of China [2010CB923000, 2007CB925001]; Chinese National Science Foundation [10774189, 11004232, 11050110422]; JSPS; TRiP-JST; MEXT of Japan; CREST-JST; National Science Foundation [DE-AC02-05CH11231, DMR-0537588] |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46385]  |
| 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 | Liu, ZH,Richard, P,Nakayama, K,et al. Unconventional superconducting gap in NaFe0.95Co0.05As observed by angle-resolved photoemission spectroscopy[J]. PHYSICAL REVIEW B,2011,84(6). |
| APA | Liu, ZH.,Richard, P.,Nakayama, K.,Chen, GF.,Dong, S.,...&Wang, SC.(2011).Unconventional superconducting gap in NaFe0.95Co0.05As observed by angle-resolved photoemission spectroscopy.PHYSICAL REVIEW B,84(6). |
| MLA | Liu, ZH,et al."Unconventional superconducting gap in NaFe0.95Co0.05As observed by angle-resolved photoemission spectroscopy".PHYSICAL REVIEW B 84.6(2011). |
入库方式： OAI收割
来源：物理研究所
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