Fermi surface dichotomy of the superconducting gap and pseudogap in underdoped pnictides
文献类型：期刊论文
| 作者 | Xu, YM ; Richard, P ; Nakayama, K ; Kawahara, T ; Sekiba, Y ; Qian, T ; Neupane, M ; Souma, S ; Sato, T ; Takahashi, T ; Luo, HQ ; Wen, HH ; Chen, GF ; Wang, NL ; Wang, Z ; Fang, Z ; Dai, X ; Ding, H |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2011 |
| 卷号 | 2 |
| 关键词 | RESOLVED PHOTOEMISSION-SPECTROSCOPY NORMAL-STATE BA0.6K0.4FE2AS2 BI2SR2CACU2O8+DELTA ANISOTROPY |
| ISSN号 | 2041-1723 |
| 通讯作者 | Ding, H: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | High-temperature superconductivity in iron-arsenic materials (pnictides) near an anti-ferromagnetic phase raises the possibility of spin-fluctuation-mediated pairing. However, the interplay between antiferromagnetic fluctuations and superconductivity remains unclear in the underdoped regime, which is closer to the antiferromagnetic phase. Here we report that the superconducting gap of underdoped pnictides scales linearly with the transition temperature, and that a distinct pseudogap coexisting with the superconducting gap develops on under-doping. This pseudogap occurs on Fermi surface sheets connected by the antiferromagnetic wavevector, where the superconducting pairing is stronger as well, suggesting that antiferromagnetic fluctuations drive both the pseudogap and superconductivity. Interestingly, we found that the pseudogap and the spectral lineshape vary with the Fermi surface quasi-nesting conditions in a fashion that shares similarities with the nodal-antinodal dichotomous behaviour observed in underdoped copper oxide superconductors. |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences; NSF [DMR-0537588]; Ministry of Science and Technology of China; TRiP-JST; CREST-JST; JSPS; MEXT of Japan; DOE of US |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38078]  |
| 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 | Xu, YM,Richard, P,Nakayama, K,et al. Fermi surface dichotomy of the superconducting gap and pseudogap in underdoped pnictides[J]. NATURE COMMUNICATIONS,2011,2. |
| APA | Xu, YM.,Richard, P.,Nakayama, K.,Kawahara, T.,Sekiba, Y.,...&Ding, H.(2011).Fermi surface dichotomy of the superconducting gap and pseudogap in underdoped pnictides.NATURE COMMUNICATIONS,2. |
| MLA | Xu, YM,et al."Fermi surface dichotomy of the superconducting gap and pseudogap in underdoped pnictides".NATURE COMMUNICATIONS 2(2011). |
入库方式： OAI收割
来源：物理研究所
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