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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
ISSN0031-9007
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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