Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors
文献类型：期刊论文
| 作者 | Song, CL ; Yin, Y ; Zech, M ; Williams, T ; Yee, MM ; Chen, GF ; Luo, JL ; Wang, NL ; Hudson, EW ; Hoffman, JE |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2013 |
| 卷号 | 87期号:21 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Song, CL (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. |
| 中文摘要 | We use scanning tunneling microscopy to map the surface structure, nanoscale electronic inhomogeneity, and vitreous vortex phase in the hole-doped superconductor Sr0.75K0.25Fe2As2 with T-c = 32 K. We find that the low-T cleaved surface is dominated by a half Sr/K termination with 1 x 2 ordering and ubiquitous superconducting gap, while patches of gapless, unreconstructed As termination appear rarely. The superconducting gap varies by sigma/(Delta) over bar = 16% on a similar to 3 nm length scale, with average 2 (Delta) over bar /k(B)T(c) = 3.6 in the weak-coupling limit. The vortex core size provides a measure of the superconducting coherence length xi = 2.3 nm. We quantify the vortex lattice correlation length at 9 T in comparison to several iron-based superconductors. The comparison leads us to suggest the importance of dopant size mismatch as a cause of dopant clustering, electronic inhomogeneity, and strong vortex pinning. |
| 资助信息 | Air Force Office of Scientific Research [FA9550-05-1-0371]; US National Science Foundation [DMR-0508812]; Golub Fellowship at Harvard University |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56899]  |
| 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 | Song, CL,Yin, Y,Zech, M,et al. Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors[J]. PHYSICAL REVIEW B,2013,87(21). |
| APA | Song, CL.,Yin, Y.,Zech, M.,Williams, T.,Yee, MM.,...&Hoffman, JE.(2013).Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors.PHYSICAL REVIEW B,87(21). |
| MLA | Song, CL,et al."Dopant clustering, electronic inhomogeneity, and vortex pinning in iron-based superconductors".PHYSICAL REVIEW B 87.21(2013). |
入库方式： OAI收割
来源：物理研究所
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