Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy
文献类型：期刊论文
| 作者 | Teague, ML ; Drayna, GK ; Lockhart, GP ; Cheng, P ; Shen, B ; Wen, HH ; Yeh, NC |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2011 |
| 卷号 | 106期号:8 |
| 关键词 | LOW-ENERGY EXCITATIONS CUPRATE SUPERCONDUCTORS LAYERED SUPERCONDUCTOR 43 K IRON LAO1-XFXFEAS |
| ISSN号 | 0031-9007 |
| 通讯作者 | Teague, ML: CALTECH, Dept Phys, Pasadena, CA 91125 USA. |
| 中文摘要 | Scanning tunneling spectroscopic studies of Ba(Fe1-xCox)(2)As-2 (x = 0.06, 0.12) single crystals reveal direct evidence for predominantly two-gap superconductivity. These gaps decrease with increasing temperature and vanish above the superconducting transition T-c. The two-gap nature and the slightly doping-and energy-dependent quasiparticle scattering interferences near the wave vectors (+/-pi, 0) and (0, +/-pi) are consistent with sign-changing s-wave superconductivity. The excess zero-bias conductance and the large gap-to-T-c ratios suggest dominant unitary impurity scattering. |
| 收录类别 | SCI |
| 资助信息 | NSF [DMR-0907251]; Kavli and Moore Foundations; NSFC; Ministry of Science and Technology of China; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41803]  |
| 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 | Teague, ML,Drayna, GK,Lockhart, GP,et al. Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy[J]. PHYSICAL REVIEW LETTERS,2011,106(8). |
| APA | Teague, ML.,Drayna, GK.,Lockhart, GP.,Cheng, P.,Shen, B.,...&Yeh, NC.(2011).Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy.PHYSICAL REVIEW LETTERS,106(8). |
| MLA | Teague, ML,et al."Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy".PHYSICAL REVIEW LETTERS 106.8(2011). |
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来源：物理研究所
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