Coexistence of superconductivity and density wave in Ba2Ti2Fe2As4O: An optical spectroscopy study
文献类型：期刊论文
| 作者 | Wang, HP ; Sun, YL ; Wang, XB ; Huang, Y ; Dong, T ; Chen, RY ; Cao, GH ; Wang, NL |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:14 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wang, HP (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We performed an optical spectroscopy measurement on single crystals of Ba2Ti2Fe2As4O, which is a newly discovered superconductor showing a coexistence of superconductivity and density wave orders. The study reveals spectral changes associated with both density wave and superconductivity phase transitions. The density wave phase transition at T-DW approximate to 125 K leads to the reconstruction of Fermi surfaces which removes about half of Drude spectral weight. The ratio of 2 Delta(DW)/k(B)T(DW) approximate to 11.9 is considerably larger than the mean-field value based on the weak-coupling BCS theory. At the lowest temperature in the superconducting state, further spectral change associated with the superconducting condensate is observed. The low frequency optical conductivity could be well modeled within the Mattis-Bardeen approach with two isotropic gaps of Delta(1)(0) = 3.4 meV and Delta(2)(0) = 7.9 meV. The superconducting properties of the Ba2Ti2Fe2As4O compound are similar to those of BaFe1.85Co0.15As2. |
| 资助信息 | National Science Foundation of China [11120101003, 11327806]; 973 project of the Ministry of Science and Technology of China [2011CB921701, 2012CB821403] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59502]  |
| 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 | Wang, HP,Sun, YL,Wang, XB,et al. Coexistence of superconductivity and density wave in Ba2Ti2Fe2As4O: An optical spectroscopy study[J]. PHYSICAL REVIEW B,2014,90(14). |
| APA | Wang, HP.,Sun, YL.,Wang, XB.,Huang, Y.,Dong, T.,...&Wang, NL.(2014).Coexistence of superconductivity and density wave in Ba2Ti2Fe2As4O: An optical spectroscopy study.PHYSICAL REVIEW B,90(14). |
| MLA | Wang, HP,et al."Coexistence of superconductivity and density wave in Ba2Ti2Fe2As4O: An optical spectroscopy study".PHYSICAL REVIEW B 90.14(2014). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。