Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides.
文献类型：期刊论文
| 作者 | Wang, Meng ; Zhang, Chenglin ; Lu, Xingye ; Tan, Guotai ; Luo, Huiqian ; Song, Yu ; Wang, Miaoyin ; Zhang, Xiaotian ; Goremychkin, E A ; Perring, T G ; Maier, T A ; Yin, Zhiping ; Haule, Kristjan ; Kotliar, Gabriel ; Dai, Pengcheng |
| 刊名 | Nature communications
 |
| 出版日期 | 2013 |
| 卷号 | 4页码:2874 |
| ISSN号 | 2041-1723 |
| 中文摘要 | High-temperature superconductivity in iron pnictides occurs when electrons and holes are doped into their antiferromagnetic parent compounds. Since spin excitations may be responsible for electron pairing and superconductivity, it is important to determine their electron/hole-doping evolution and connection with superconductivity. Here we use inelastic neutron scattering to show that while electron doping to the antiferromagnetic BaFe2As2 parent compound modifies the low-energy spin excitations and their correlation with superconductivity (<50meV) without affecting the high-energy spin excitations (>100meV), hole-doping suppresses the high-energy spin excitations and shifts the magnetic spectral weight to low-energies. In addition, our absolute spin susceptibility measurements for the optimally hole-doped iron pnictide reveal that the change in magnetic exchange energy below and above Tc can account for the superconducting condensation energy. These results suggest that high-Tc superconductivity in iron pnictides is associated with both the presence of high-energy spin excitations and a coupling between low-energy spin excitations and itinerant electrons. |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57776]  |
| 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 | Wang, Meng,Zhang, Chenglin,Lu, Xingye,et al. Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides.[J]. Nature communications,2013,4:2874. |
| APA | Wang, Meng.,Zhang, Chenglin.,Lu, Xingye.,Tan, Guotai.,Luo, Huiqian.,...&Dai, Pengcheng.(2013).Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides..Nature communications,4,2874. |
| MLA | Wang, Meng,et al."Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides.".Nature communications 4(2013):2874. |
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来源：物理研究所
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