Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As
文献类型：期刊论文
| 作者 | Wang, ZY ; Yang, H ; Fang, DL ; Shen, B ; Wang, QH ; Shan, L ; Zhang, CL ; Dai, PC ; Wen, HH |
| 刊名 | NATURE PHYSICS
 |
| 出版日期 | 2013 |
| 卷号 | 9期号:1页码:42 |
| ISSN号 | 1745-2473 |
| 通讯作者 | Wen, HH (reprint author), Nanjing Univ, Natl Lab Solid State Microstruct, Ctr Superconducting Phys & Mat, Nanjing 210093, Jiangsu, Peoples R China. |
| 中文摘要 | Since the discovery in 2008 of high-temperature superconductivity in the iron pnictides and chalcogenides, a central issue has been the microscopic origin of the superconducting pairing. In particular, it remains unclear whether there is a bosonic mode from the tunnelling spectrum, which has a close and universal relationship with superconductivity as well as with the observed spin excitation. Here, on the basis of measurements of scanning tunnelling spectroscopy, we show clear evidence of a bosonic mode with energy identical to that of the neutron spin resonance in two completely different systems, Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As, with different superconducting transition temperatures. In both samples, the superconducting coherence peaks and the mode feature vanish simultaneously inside the vortex core or above the transition temperature T-c, indicating a close relationship between superconductivity and the bosonic mode. Our data also demonstrate a universal ratio between the mode energy and superconducting transition temperature, that is Omega/k(B)T(c) approximate to 4.3, which underlines the unconventional nature of superconductivity in the iron pnictide superconductors. |
| 资助信息 | NSF of China; Ministry of Science and Technology of China [2011CBA00100, 2012CB821403, 2012CB21400, 2010CB923002, 2011CB922101]; PAPD; US DOE BES [DE-FG02-05ER46202] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56815]  |
| 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, ZY,Yang, H,Fang, DL,et al. Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As[J]. NATURE PHYSICS,2013,9(1):42. |
| APA | Wang, ZY.,Yang, H.,Fang, DL.,Shen, B.,Wang, QH.,...&Wen, HH.(2013).Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As.NATURE PHYSICS,9(1),42. |
| MLA | Wang, ZY,et al."Close relationship between superconductivity and the bosonic mode in Ba0.6K0.4Fe2As2 and Na(Fe0.975Co0.025)As".NATURE PHYSICS 9.1(2013):42. |
入库方式： OAI收割
来源：物理研究所
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