Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl0.63K0.37Fe1.78Se2
文献类型：期刊论文
| 作者 | Wang, XP ; Richard, P ; Shi, X ; Roekeghem, A ; Huang, YB ; Razzoli, E ; Qian, T ; Rienks, E ; Thirupathaiah, S ; Wang, HD ; Dong, CH ; Fang, MH ; Shi, M ; Ding, H |
| 刊名 | EPL
 |
| 出版日期 | 2012 |
| 卷号 | 99期号:6 |
| 关键词 | RESOLVED PHOTOEMISSION-SPECTROSCOPY FERMI-SURFACE INSULATOR |
| ISSN号 | 0295-5075 |
| 通讯作者 | Wang, XP (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We performed a high-resolution angle-resolved photoemission spectroscopy study on superconducting (SC) Tl0.63K0.37Fe1.78Se2 (T-c = 29 K) in the whole Brillouin zone (BZ). In addition to a nearly isotropic similar to 8.2 meV 2-dimensional (2D) SC gap (2 Delta/k(B)T(c) similar to 7) on quasi-2D electron Fermi surfaces (FSs) located around M(pi, 0, 0)-A(pi, 0, pi), we observe a similar to 6.2 meV isotropic SC gap (2 Delta/k(B)T(c) similar to 5) on the Z-centred electron FS that rules out any d-wave pairing symmetry and rather favors an s-wave symmetry. All isotropic SC gap amplitudes can be fit by a single-gap function derived from a local strong-coupling approach suggesting an enhancement of the next-nearest neighbor exchange interaction in the ferrochalcogenide superconductors. Copyright (C) EPLA, 2012 |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences [2010Y1JB6]; Ministry of Science and Technology of China [2010CB923000, 2011CBA0010]; Nature Science Foundation of China [10974175, 11004232, 11050110422]; Sino-Swiss Science and Technology Cooperation [IZLCZ2 138954] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50135]  |
| 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 | Wang, XP,Richard, P,Shi, X,et al. Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl0.63K0.37Fe1.78Se2[J]. EPL,2012,99(6). |
| APA | Wang, XP.,Richard, P.,Shi, X.,Roekeghem, A.,Huang, YB.,...&Ding, H.(2012).Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl0.63K0.37Fe1.78Se2.EPL,99(6). |
| MLA | Wang, XP,et al."Observation of an isotropic superconducting gap at the Brillouin zone centre of Tl0.63K0.37Fe1.78Se2".EPL 99.6(2012). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。