Role of hydrogen in the electronic properties of CaFeAsH-based superconductors
文献类型：期刊论文
| 作者 | Huang, Y. N.1,2,3; Liu, D. Y.1; Zou, L. J.1,2; Pickett, W. E.3 |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2016-05-23 |
| 卷号 | 93期号:19页码:1-9 |
| DOI | 10.1103/PhysRevB.93.195148 |
| 文献子类 | Article |
| 英文摘要 | The electronic and magnetic properties of the hydride superconductor CaFeAsH, which superconducts up to 47 K when electron doped with La, and the isovalent alloy system CaFeAsH1-xFx are investigated using density functional based methods. The (Q) over right arrow = (pi, pi, 0) peak of the nesting function xi((q) over right arrow) is found to be extremely strong and sharp, and the additional structure in xi((q) over right arrow) associated with the near-circular Fermi surfaces (FSs) that may impact low energy excitations is quantified. The unusual band introduced by H, which shows strong dispersion perpendicular to the FeAs layers, is shown to be connected to a peculiar van Hove singularity just below the Fermi level. This band provides a three-dimensional electron ellipsoid Fermi surface not present in other Fe-based superconducting materials nor in CaFeAsF. Electron doping by 25% La or Co has a minor effect on this ellipsoid Fermi surface, but suppresses FS nesting strongly, consistent with the viewpoint that eliminating strong nesting and the associated magnetic order allows high T-c superconductivity to emerge. Various aspects of the isovalent alloy system CaFeAsH1-xFx and means of electron doping are discussed in terms of influence of incipient bands. |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000376636900005 |
| 资助机构 | NSFC of China(11274310 ; NSFC of China(11274310 ; NSFC of China(11274310 ; NSFC of China(11274310 ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; 11474287 ; 11474287 ; 11474287 ; 11474287 ; 11574315) ; 11574315) ; 11574315) ; 11574315) ; NSFC of China(11274310 ; NSFC of China(11274310 ; NSFC of China(11274310 ; NSFC of China(11274310 ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; US National Science Foundation(DMR-1207622) ; 11474287 ; 11474287 ; 11474287 ; 11474287 ; 11574315) ; 11574315) ; 11574315) ; 11574315) |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/22424]  |
| 专题 | 合肥物质科学研究院_中科院固体物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, POB 1129, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.Univ Calif Davis, Dept Phys, Davis, CA 95616 USA |
| 推荐引用方式 GB/T 7714 | Huang, Y. N.,Liu, D. Y.,Zou, L. J.,et al. Role of hydrogen in the electronic properties of CaFeAsH-based superconductors[J]. PHYSICAL REVIEW B,2016,93(19):1-9. |
| APA | Huang, Y. N.,Liu, D. Y.,Zou, L. J.,&Pickett, W. E..(2016).Role of hydrogen in the electronic properties of CaFeAsH-based superconductors.PHYSICAL REVIEW B,93(19),1-9. |
| MLA | Huang, Y. N.,et al."Role of hydrogen in the electronic properties of CaFeAsH-based superconductors".PHYSICAL REVIEW B 93.19(2016):1-9. |
入库方式： OAI收割
来源：合肥物质科学研究院
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