Robustness of s-Wave Pairing in Electron-Overdoped A(1-y)Fe(2-x)Se(2) (A = K, Cs)
文献类型：期刊论文
| 作者 | Fang, C ; Wu, YL ; Thomale, R ; Bernevig, BA ; Hu, JP |
| 刊名 | PHYSICAL REVIEW X
 |
| 出版日期 | 2011 |
| 卷号 | 1期号:1 |
| 关键词 | RENORMALIZATION-GROUP IRON PNICTIDES SUPERCONDUCTIVITY COEXISTENCE INSULATOR ORDER |
| ISSN号 | 2160-3308 |
| 通讯作者 | Fang, C (reprint author), Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA. |
| 中文摘要 | Using self-consistent mean-field and functional renormalization-group approaches, we show that s-wave pairing symmetry is robust in the heavily electron-doped iron chalcogenides AFe(2-x)Se(2), where A = K,Cs. Recent neutron scattering experiments suggest that the effective nearest-neighbor spin exchange may be ferromagnetic in chalcogenides. This is different from the iron pnictides, where the nearest-neighbor magnetic exchange coupling is believed to be antiferromagnetic and leads to strong competition between s-wave and d-wave pairing in the electron-overdoped region. Our finding of a robust s-wave pairing in (K,Cs)Fe2-xSe2 differs from the d-wave pairing result obtained by other theories where nonlocal bare interaction terms and the next-to-nearest-neighbor J(2) term are underestimated. Detecting the pairing symmetry in (K,Cs)Fe2-xSe2 may hence provide important insights regarding the mechanism of superconducting pairing in iron-based superconductors. |
| 收录类别 | SCI |
| 资助信息 | Institute of Physics, CAS; DFG [SPP 1458/1]; Feodor Lynen Fellowship of the Humboldt Foundation; NSF [DMR-095242]; Princeton Startup Funds; Sloan Foundation; NSF China [11050110420]; MRSEC at Princeton University, NSF [DMR-0819860] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/52213]  |
| 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 | Fang, C,Wu, YL,Thomale, R,et al. Robustness of s-Wave Pairing in Electron-Overdoped A(1-y)Fe(2-x)Se(2) (A = K, Cs)[J]. PHYSICAL REVIEW X,2011,1(1). |
| APA | Fang, C,Wu, YL,Thomale, R,Bernevig, BA,&Hu, JP.(2011).Robustness of s-Wave Pairing in Electron-Overdoped A(1-y)Fe(2-x)Se(2) (A = K, Cs).PHYSICAL REVIEW X,1(1). |
| MLA | Fang, C,et al."Robustness of s-Wave Pairing in Electron-Overdoped A(1-y)Fe(2-x)Se(2) (A = K, Cs)".PHYSICAL REVIEW X 1.1(2011). |
入库方式： OAI收割
来源：物理研究所
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