Doping dependence of the superconductivity of (Ca1-xNax)Fe2As2
文献类型：期刊论文
| 作者 | Zhao, K ; Liu, QQ ; Wang, XC ; Deng, Z ; Lv, YX ; Zhu, JL ; Li, FY ; Jin, CQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:18 |
| 关键词 | LAYERED SUPERCONDUCTOR SPIN |
| ISSN号 | 1098-0121 |
| 通讯作者 | Zhao, K: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Single-crystalline CaFe2As2 and (Ca1-xNax)Fe2As2 polycrystals (0 < x < 0.66) are synthesized and characterized using structural, magnetic, electronic transport, and heat capacity measurements. These measurements show that the structural/magnetic phase transition in CaFe2As2 at 165 K is monotonically suppressed by the Na doping and that superconductivity can be realized over a wide doping region. For 0.3 < x < 0.36, the magnetic susceptibilities indicate the possible coexistence of the spin density wave (SDW) and superconductivity. Superconducting phases corresponding to the Na doping level in (Ca1-xNax)Fe2As2 for nominal x = 0.36, 0.4, 0.5, 0.6, and 0.66, with Tc = 17, 19, 22, 33, and 34 K, respectively, are identified. The effects of the magnetic field on the superconductivity transitions for x = 0.66 samples are studied from which high upper critical fields H-c2 approximate to 103 T is deduced. A phase diagram of the SDW and superconductivity as a function of the doping level is thus presented. |
| 收录类别 | SCI |
| 资助信息 | nsf; MOST of China [2010CB923001, 2011CBA00103] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36188]  |
| 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 | Zhao, K,Liu, QQ,Wang, XC,et al. Doping dependence of the superconductivity of (Ca1-xNax)Fe2As2[J]. PHYSICAL REVIEW B,2011,84(18). |
| APA | Zhao, K.,Liu, QQ.,Wang, XC.,Deng, Z.,Lv, YX.,...&Jin, CQ.(2011).Doping dependence of the superconductivity of (Ca1-xNax)Fe2As2.PHYSICAL REVIEW B,84(18). |
| MLA | Zhao, K,et al."Doping dependence of the superconductivity of (Ca1-xNax)Fe2As2".PHYSICAL REVIEW B 84.18(2011). |
入库方式： OAI收割
来源：物理研究所
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