Doping-dependent anisotropic superconducting gap in Na1-delta(Fe1-xCox)As from London penetration depth
文献类型：期刊论文
| 作者 | Cho, K ; Tanatar, MA ; Spyrison, N ; Kim, H ; Song, Y ; Dai, PC ; Zhang, CL ; Prozorov, R |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:2 |
| 关键词 | PRESSURE LIFEAS NAFEAS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Prozorov, R: Ames Lab, Ames, IA 50011 USA. |
| 中文摘要 | The London penetration depth was measured in single crystals of self-doped Na1-delta FeAs (from under doping to optimal doping, T-c from 14 to 27 K) and electron-doped Na(Fe1-xCox)As with x ranging from undoped, x = 0, to overdoped, x = 0.1. In all samples, the low-temperature variation of the penetration depth exhibits a power-law dependence, Delta lambda(T) = AT(n), with the exponent that varies in a domelike fashion from n similar to 1.1 in the underdoped, reaching a maximum of n similar to 1.9 in the optimally doped, and decreasing again to n similar to 1.3 on the overdoped side. While the anisotropy of the gap structure follows a universal domelike evolution, the exponent at optimal doping, n similar to 1.9, is lower than in other charge-doped Fe-based superconductors (FeSCs). The full-temperature range superfluid density, rho(s)(T) = [lambda(0)/lambda(T)](2), at optimal doping is also distinctly different from other charge-doped FeSCs but is similar to isovalently substituted BaFe2(As1-x P-x)(2), believed to be a nodal pnictide at optimal doping. These results suggest that the superconducting gap in Na(Fe1-xCox) As is highly anisotropic even at optimal doping. |
| 收录类别 | SCI |
| 资助信息 | U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-07CH11358]; U.S. DOE BES [DE-FG02-05ER46202] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36202]  |
| 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 | Cho, K,Tanatar, MA,Spyrison, N,et al. Doping-dependent anisotropic superconducting gap in Na1-delta(Fe1-xCox)As from London penetration depth[J]. PHYSICAL REVIEW B,2012,86(2). |
| APA | Cho, K.,Tanatar, MA.,Spyrison, N.,Kim, H.,Song, Y.,...&Prozorov, R.(2012).Doping-dependent anisotropic superconducting gap in Na1-delta(Fe1-xCox)As from London penetration depth.PHYSICAL REVIEW B,86(2). |
| MLA | Cho, K,et al."Doping-dependent anisotropic superconducting gap in Na1-delta(Fe1-xCox)As from London penetration depth".PHYSICAL REVIEW B 86.2(2012). |
入库方式： OAI收割
来源：物理研究所
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