Superconducting Phases in Potassium-Intercalated Iron Selenides
文献类型：期刊论文
| 作者 | Ying, TP ; Chen, XL ; Wang, G ; Jin, SF ; Lai, XF ; Zhou, TT ; Zhang, H ; Shen, SJ ; Wang, WY |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2013 |
| 卷号 | 135期号:8页码:2951 |
| ISSN号 | 0002-7863 |
| 通讯作者 | Chen, XL (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Res & Dev Ctr Funct Crystals, Beijing 100190, Peoples R China. |
| 中文摘要 | The ubiquitous coexistence of majority insulating 245 phases and minority superconducting (SC) phases in A(x)Fe(2-y)Se(2) (A = K, Cs, Rb, Tl/Rb, Tl/K) formed by high-temperature routes makes pure SC phases highly desirable for studying the intrinsic properties of this SC family. Here we report that there are at least two pure SC phases, KxFe2Se2(NH3)(y) (x approximate to 0.3 and 0.6), determined mainly by potassium concentration in the K-intercalated iron selenides formed via the liquid ammonia route. K0.3Fe2Se2(NH3)(0.47) corresponds to the 44 K phase with lattice constant c = 15.56(1) angstrom and Ka(6)Fe(2)Se(2)(NH3)(0.37) to the 30 K phase with c = 14.84(1) angstrom. With higher potassium doping, the 44 K phase can be converted into the 30 K phase. NH3 has little, if any, effect on superconductivity. Thus, the conclusions should apply to both K0.3Fe2Se2 and K0.6Fe2Se2 SC phases. K(0.3)Pe(2)Se(2)(NH3)(0.47) and K0.6Fe2Se2(NH3)(0.37) stand out among known superconductors as their structures are stable only at particular potassium doping levels, and hence the variation of T-c with doping is not dome-like. |
| 资助信息 | National Natural Science Foundation of China [90922037, 51072226, 51202286]; Chinese Academy of Sciences; ICDD |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57509]  |
| 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 | Ying, TP,Chen, XL,Wang, G,et al. Superconducting Phases in Potassium-Intercalated Iron Selenides[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2013,135(8):2951. |
| APA | Ying, TP.,Chen, XL.,Wang, G.,Jin, SF.,Lai, XF.,...&Wang, WY.(2013).Superconducting Phases in Potassium-Intercalated Iron Selenides.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,135(8),2951. |
| MLA | Ying, TP,et al."Superconducting Phases in Potassium-Intercalated Iron Selenides".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 135.8(2013):2951. |
入库方式： OAI收割
来源：物理研究所
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