Pressure-induced unconventional superconductivity near a quantum critical point in CaFe2As2
文献类型：期刊论文
| 作者 | Kawasaki, S ; Tabuchi, T ; Wang, XF ; Chen, XH ; Zheng, GQ |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2010 |
| 卷号 | 23期号:5 |
| 关键词 | SPIN-SINGLET SUPERCONDUCTIVITY ANTIFERROMAGNETIC ORDER GAPS FLUCTUATIONS |
| ISSN号 | 0953-2048 |
| 通讯作者 | Kawasaki, S (reprint author), Okayama Univ, Dept Phys, Okayama 7008530, Japan. |
| 中文摘要 | As-75-zero-field nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements are performed on CaFe2As2 under pressure. At P = 4.7 and 10.8 kbar, the temperature dependencies of nuclear-spin-lattice relaxation rate (1/T-1) measured in the tetragonal phase show no coherence peak just below T-c(P) and decrease with decreasing temperature. The superconductivity is gapless at P = 4.7 kbar but evolves to that with multiple gaps at P = 10.8 kbar. We find that the superconductivity appears near a quantum critical point under pressures in the range 4.7 kbar <= P <= 10.8 kbar. Both electron correlation and superconductivity disappear in the collapsed tetragonal phase. A systematic study under pressure indicates that electron correlations play a vital role in forming Cooper pairs in this compound. |
| 收录类别 | SCI |
| 资助信息 | Ministry of Education, Culture, Sports, Science, and Technology, Japan [21102514] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51453]  |
| 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 | Kawasaki, S,Tabuchi, T,Wang, XF,et al. Pressure-induced unconventional superconductivity near a quantum critical point in CaFe2As2[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2010,23(5). |
| APA | Kawasaki, S,Tabuchi, T,Wang, XF,Chen, XH,&Zheng, GQ.(2010).Pressure-induced unconventional superconductivity near a quantum critical point in CaFe2As2.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,23(5). |
| MLA | Kawasaki, S,et al."Pressure-induced unconventional superconductivity near a quantum critical point in CaFe2As2".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 23.5(2010). |
入库方式： OAI收割
来源：物理研究所
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