Normal-State Hourglass Dispersion of the Spin Excitations in FeSexTe1-x
文献类型：期刊论文
| 作者 | Li, SL ; Zhang, CL ; Wang, M ; Luo, HQ ; Lu, XY ; Faulhaber, E ; Schneidewind, A ; Link, P ; Hu, JP ; Xiang, T ; Dai, PC |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2010 |
| 卷号 | 105期号:15 |
| ISSN号 | 0031-9007 |
| 关键词 | TEMPERATURE SUPERCONDUCTOR |
| 通讯作者 | Li, SL (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We use cold neutron spectroscopy to study the low-energy spin excitations of superconducting (SC) FeSe0.4Te0.6 and essentially nonsuperconducting (NSC) FeSe0.45Te0.55. In contrast with BaFe2-x(Co, Ni)(x)As-2, where the low-energy spin excitations are commensurate both in the SC and normal state, the normal-state spin excitations in SC FeSe0.4Te0.6 are incommensurate and show an hourglass dispersion near the resonance energy. Since similar hourglass dispersion is also found in the NSC FeSe0.45Te0.55, we argue that the observed incommensurate spin excitations in FeSe1-xTex are not directly associated with superconductivity. Instead, the results can be understood within a picture of Fermi surface nesting assuming extremely low Fermi velocities and spin-orbital coupling. |
| 资助信息 | Chinese Academy of Science [2010CB833102]; US DOE, BES, through DOE [DE-FG02-05ER46202]; US DOE, BES, through Division of Scientific User Facilities |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50021]  |
| 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 | Li, SL,Zhang, CL,Wang, M,et al. Normal-State Hourglass Dispersion of the Spin Excitations in FeSexTe1-x[J]. PHYSICAL REVIEW LETTERS,2010,105(15). |
| APA | Li, SL.,Zhang, CL.,Wang, M.,Luo, HQ.,Lu, XY.,...&Dai, PC.(2010).Normal-State Hourglass Dispersion of the Spin Excitations in FeSexTe1-x.PHYSICAL REVIEW LETTERS,105(15). |
| MLA | Li, SL,et al."Normal-State Hourglass Dispersion of the Spin Excitations in FeSexTe1-x".PHYSICAL REVIEW LETTERS 105.15(2010). |
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来源：物理研究所
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