Transport properties and asymmetric scattering in Ba1-xKxFe2As2 single crystals
文献类型：期刊论文
| 作者 | Shen, B ; Yang, H ; Wang, ZS ; Han, F ; Zeng, B ; Shan, L ; Ren, C ; Wen, HH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:18 |
| 关键词 | SUPERCONDUCTIVITY |
| ISSN号 | 1098-0121 |
| 通讯作者 | Shen, B (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | Resistivity, Hall effect, and magnetoresistance have been investigated systematically on single crystals of Ba1-xKxFe2As2 ranging from undoped to optimally doped regions. A systematic evolution of these properties has been observed. It is found that the resistivity in the normal state of Ba1-xKxFe2As2 is insensitive to the doped potassium concentration, which is very different from the electron-doped counterpart Ba(Fe1-xCox)(2)As-2, where the resistivity at 300 K reduces to the half value of the undoped one when the system is optimally doped. In stark contrast, the Hall coefficient R-H changes suddenly from a negative value in the undoped sample to a positive one with slight K doping, and it keeps lowering with further doping. We interpret this dichotomy as being due to the asymmetric scattering rate in the hole and the electron pockets with much higher mobility of the latter. The magnetoresistivity shows also a nonmonotonic doping dependence indicating an anomalous feature at about 80 to 100 K, even in the optimally doped sample, which is associated with a possible pseudogap effect. In the low-temperature region, it seems that the resistivity has similar values when superconductivity sets in, regardless of the different T-c values, which indicates that the influence of impurity scattering on superconductivity is weak. A linear feature of resistivity rho(ab) versus T was observed just above T-c for the optimally doped sample, suggesting a quantum criticality. |
| 收录类别 | SCI |
| 资助信息 | Natural Science Foundation of China; Ministry of Science and Technology of China [2011CBA001002]; Ministry of Education of China |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46110]  |
| 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 | Shen, B,Yang, H,Wang, ZS,et al. Transport properties and asymmetric scattering in Ba1-xKxFe2As2 single crystals[J]. PHYSICAL REVIEW B,2011,84(18). |
| APA | Shen, B.,Yang, H.,Wang, ZS.,Han, F.,Zeng, B.,...&Wen, HH.(2011).Transport properties and asymmetric scattering in Ba1-xKxFe2As2 single crystals.PHYSICAL REVIEW B,84(18). |
| MLA | Shen, B,et al."Transport properties and asymmetric scattering in Ba1-xKxFe2As2 single crystals".PHYSICAL REVIEW B 84.18(2011). |
入库方式： OAI收割
来源：物理研究所
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