Out-of-plane effect on the superconductivity of Sr2-xBaxCuO3+delta with T-c up to 98 K
文献类型：期刊论文
| 作者 | Gao, WB ; Liu, QQ ; Yang, LX ; Yu, Y ; Li, FY ; Jin, CQ ; Uchida, S |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2009 |
| 卷号 | 80期号:9 |
| 关键词 | HIGH-PRESSURE SYNTHESIS INTERATOMIC DISTANCES BI2SR2CACU2O8+DELTA PHASE (SR 94-K SR BA CA)(3)CU2O4+DELTA-CL2-Y |
| ISSN号 | 1098-0121 |
| 通讯作者 | Jin, CQ (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | A series of new Sr2-xBaxCuO3+delta (0 < x < 0.6) superconductors were prepared using high-pressure and high-temperature synthesis. A Rietveld refinement based on powder x-ray diffraction confirms that the superconductors crystallize in the K2NiF4-type structure of a space group I4/mmm similar to that of La2CuO4 but with partially occupied apical oxygen sites. It is found that the superconducting transition temperature T-c of this Ba substituted Sr2CuO3+delta superconductor with constant carrier-doping level, i.e., constant delta is controlled not only by order/disorder of apical-O atoms but also by Ba content. T-c(max)=98 K is achieved in the material with x=0.6 that reaches the record value of T-c among the single-layer copper oxide superconductors and is higher than T-c=95 K of Sr2CuO3+delta with optimally ordered apical-O atoms. There is Sr-site disorder in Sr2-xBaxCuO3+delta which might lead to a reduction in T-c. The result indicates that another effect surpasses the disorder effect that is related either to the increased in-plane Cu-O bond length or to elongated apical-O distance due to Ba substitution with larger cation size. The present experiment demonstrates that the optimization of local geometry out of the Cu-O plane can dramatically enhance T-c in the cuprate superconductors. |
| 收录类别 | SCI |
| 资助信息 | NSF; MOST of China; MEXT, Japan; Japan Society for the Promotion of Science |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50525]  |
| 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 | Gao, WB,Liu, QQ,Yang, LX,et al. Out-of-plane effect on the superconductivity of Sr2-xBaxCuO3+delta with T-c up to 98 K[J]. PHYSICAL REVIEW B,2009,80(9). |
| APA | Gao, WB.,Liu, QQ.,Yang, LX.,Yu, Y.,Li, FY.,...&Uchida, S.(2009).Out-of-plane effect on the superconductivity of Sr2-xBaxCuO3+delta with T-c up to 98 K.PHYSICAL REVIEW B,80(9). |
| MLA | Gao, WB,et al."Out-of-plane effect on the superconductivity of Sr2-xBaxCuO3+delta with T-c up to 98 K".PHYSICAL REVIEW B 80.9(2009). |
入库方式： OAI收割
来源：物理研究所
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