Spin gap and magnetic resonance in superconducting BaFe1.9Ni0.1As2
文献类型：期刊论文
| 作者 | Li, SL ; Chen, Y ; Chang, S ; Lynn, JW ; Li, LJ ; Luo, YK ; Cao, GH ; Xu, ZA ; Dai, PC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2009 |
| 卷号 | 79期号:17 |
| 关键词 | IRON-BASED SUPERCONDUCTORS TEMPERATURE SUPERCONDUCTOR NEUTRON-SCATTERING BA0.6K0.4FE2AS2 EXCITATIONS SPECTRA |
| ISSN号 | 1098-0121 |
| 通讯作者 | Li, SL (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. |
| 中文摘要 | We use neutron spectroscopy to determine the nature of the magnetic excitations in superconducting BaFe1.9Ni0.1As2(T-c=20 K). Above T-c the excitations are gapless and centered at the commensurate antiferromagnetic wave vector of the parent compound, while the intensity exhibits a sinusoidal modulation along the c axis. As the superconducting state is entered a spin gap gradually opens, whose magnitude tracks the T dependence of the superconducting gap as observed by angle-resolved photoemission. Both the spin-gap and magnetic-resonance energies are temperature and wave-vector dependent, but their ratio is the same within uncertainties. These results suggest that the spin resonance is a singlet-triplet excitation related to electron pairing and superconductivity. |
| 收录类别 | SCI |
| 资助信息 | U.S. DOE BES [DE-FG02-05ER46202]; NSF [DMR-0756568, DMR-0454672] |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57842]  |
| 专题 | 物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li, SL,Chen, Y,Chang, S,et al. Spin gap and magnetic resonance in superconducting BaFe1.9Ni0.1As2[J]. PHYSICAL REVIEW B,2009,79(17). |
| APA | Li, SL.,Chen, Y.,Chang, S.,Lynn, JW.,Li, LJ.,...&Dai, PC.(2009).Spin gap and magnetic resonance in superconducting BaFe1.9Ni0.1As2.PHYSICAL REVIEW B,79(17). |
| MLA | Li, SL,et al."Spin gap and magnetic resonance in superconducting BaFe1.9Ni0.1As2".PHYSICAL REVIEW B 79.17(2009). |
入库方式： OAI收割
来源：物理研究所
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