Persistent high-energy spin excitations in iron-pnictide superconductors
文献类型：期刊论文
| 作者 | Zhou, KJ ; Huang, YB ; Monney, C ; Dai, X ; Strocov, VN ; Wang, NL ; Chen, ZG ; Zhang, CL ; Dai, PC ; Patthey, L ; van den Brink, J ; Ding, H ; Schmitt, T |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2013 |
| 卷号 | 4 |
| ISSN号 | 2041-1723 |
| 通讯作者 | Zhou, KJ (reprint author), Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland. |
| 中文摘要 | Motivated by the premise that superconductivity in iron-based superconductors is unconventional and mediated by spin fluctuations, an intense research effort has been focused on characterizing the spin-excitation spectrum in the magnetically ordered parent phases of the Fe pnictides and chalcogenides. For these undoped materials, it is well established that the spin-excitation spectrum consists of sharp, highly dispersive magnons. The fate of these high-energy magnetic modes upon sizable doping with holes is hitherto unresolved. Here we demonstrate, using resonant inelastic X-ray scattering, that optimally hole-doped superconducting Ba0.6K0.4Fe2As2 retains well-defined, dispersive high-energy modes of magnetic origin. These paramagnon modes are softer than, though as intense as, the magnons of undoped antiferromagnetic BaFe2As2. The persistence of spin excitations well into the superconducting phase suggests that the spin fluctuations in Fe-pnictide superconductors originate from a distinctly correlated spin state. This connects Fe pnictides to cuprates, for which, in spite of fundamental electronic structure differences, similar paramagnons are present. |
| 资助信息 | Swiss National Science Foundation, its NCCR MaNEP; National Basic Research (973) Program of China; Chinese Academy of Sciences |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57324]  |
| 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 | Zhou, KJ,Huang, YB,Monney, C,et al. Persistent high-energy spin excitations in iron-pnictide superconductors[J]. NATURE COMMUNICATIONS,2013,4. |
| APA | Zhou, KJ.,Huang, YB.,Monney, C.,Dai, X.,Strocov, VN.,...&Schmitt, T.(2013).Persistent high-energy spin excitations in iron-pnictide superconductors.NATURE COMMUNICATIONS,4. |
| MLA | Zhou, KJ,et al."Persistent high-energy spin excitations in iron-pnictide superconductors".NATURE COMMUNICATIONS 4(2013). |
入库方式： OAI收割
来源：物理研究所
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