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Li, Shiliang; Zhang, Chenglin; Wang, Meng; Luo, Hui-qian; Lu, Xingye; Faulhaber, Enrico; Schneidewind, Astrid; Link, Peter; Hu, Jiangping; Xiang, Tao; Dai, Pengcheng; Li, SL , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China | |
Normal-State Hourglass Dispersion of the Spin Excitations in FeSe(x)Te(1-x) | |
发表期刊 | PHYSICAL REVIEW LETTERS |
关键词 | Temperature Superconductor |
摘要 | We use cold neutron spectroscopy to study the low-energy spin excitations of superconducting (SC) FeSe(0.4)Te(0.6) and essentially nonsuperconducting (NSC) FeSe(0.45)Te(0.55). In contrast with BaFe(2-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 FeSe(0.4)Te(0.6) are incommensurate and show an hourglass dispersion near the resonance energy. Since similar hourglass dispersion is also found in the NSC FeSe(0.45)Te(0.55), we argue that the observed incommensurate spin excitations in FeSe(1-x)Te(x) 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. |
2010 | |
ISSN | 0031-9007 |
卷号 | 105期号:15页码:- |
学科领域 | Physics |
收录类别 | SCI |
项目资助者 | Chinese Academy of Science[2010CB833102]; US DOE, BES, through DOE[DE-FG02-05ER46202]; US DOE, BES, through Division of Scientific User Facilities ; Chinese Academy of Science[2010CB833102]; US DOE, BES, through DOE[DE-FG02-05ER46202]; US DOE, BES, through Division of Scientific User Facilities ; Chinese Academy of Science[2010CB833102]; US DOE, BES, through DOE[DE-FG02-05ER46202]; US DOE, BES, through Division of Scientific User Facilities ; Chinese Academy of Science[2010CB833102]; US DOE, BES, through DOE[DE-FG02-05ER46202]; US DOE, BES, through Division of Scientific User Facilities |
文献类型 | 期刊论文 |
条目标识符 | http://ir.itp.ac.cn/handle/311006/5032 |
专题 | SCI期刊论文 |
通讯作者 | Li, SL , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Shiliang,Zhang, Chenglin,Wang, Meng,et al. Normal-State Hourglass Dispersion of the Spin Excitations in FeSe(x)Te(1-x)[J]. PHYSICAL REVIEW LETTERS,2010,105(15):-. |
APA | Li, Shiliang.,Zhang, Chenglin.,Wang, Meng.,Luo, Hui-qian.,Lu, Xingye.,...&Li, SL , Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.(2010).Normal-State Hourglass Dispersion of the Spin Excitations in FeSe(x)Te(1-x).PHYSICAL REVIEW LETTERS,105(15),-. |
MLA | Li, Shiliang,et al."Normal-State Hourglass Dispersion of the Spin Excitations in FeSe(x)Te(1-x)".PHYSICAL REVIEW LETTERS 105.15(2010):-. |
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