Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe1.904Ni0.096As2
文献类型：期刊论文
| 作者 | Luo, HQ ; Wang, M ; Zhang, CL ; Lu, XY ; Regnault, LP ; Zhang, R ; Li, SL ; Hu, JP ; Dai, PC |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2013 |
| 卷号 | 111期号:10 |
| ISSN号 | 0031-9007 |
| 通讯作者 | Luo, HQ (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We use polarized neutron scattering to demonstrate that in-plane spin excitations in electron doped superconducting BaFe1.904Ni0.096As2 (T-c = 19.8 K) change from isotropic to anisotropic in the tetragonal phase well above the antiferromagnetic (AFM) ordering and tetragonal-to-orthorhombic lattice distortion temperatures (T-N approximate to T-s = 33 +/- 2 K) without an uniaxial pressure. While the anisotropic spin excitations are not sensitive to the AFM order and tetragonal-to-orthorhombic lattice distortion, superconductivity induces further anisotropy for spin excitations along the [110] and [1 (1) over bar0] directions. These results indicate that the spin excitation anisotropy is a probe of the electronic anisotropy or orbital ordering in the tetragonal phase of iron pnictides. |
| 资助信息 | MOST [2012CB821400, 2011CBA00110, 2010CB833102]; U.S. NSF [NSF-DMR-1063866, NSF-OISE-0968226]; NSFC [11004233] |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57457]  |
| 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 | Luo, HQ,Wang, M,Zhang, CL,et al. Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe1.904Ni0.096As2[J]. PHYSICAL REVIEW LETTERS,2013,111(10). |
| APA | Luo, HQ.,Wang, M.,Zhang, CL.,Lu, XY.,Regnault, LP.,...&Dai, PC.(2013).Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe1.904Ni0.096As2.PHYSICAL REVIEW LETTERS,111(10). |
| MLA | Luo, HQ,et al."Spin Excitation Anisotropy as a Probe of Orbital Ordering in the Paramagnetic Tetragonal Phase of Superconducting BaFe1.904Ni0.096As2".PHYSICAL REVIEW LETTERS 111.10(2013). |
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来源：物理研究所
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