Temperature dependence of the paramagnetic spin excitations in BaFe2As2 | |
Harriger, LW ; Liu, MS ; Luo, HQ ; Ewings, RA ; Frost, CD ; Perring, TG ; Dai, PC | |
刊名 | PHYSICAL REVIEW B
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2012 | |
卷号 | 86期号:14 |
关键词 | MAGNETIC EXCITATIONS IRON SUPERCONDUCTIVITY SCATTERING TRANSITION ANISOTROPY |
ISSN号 | 1098-0121 |
通讯作者 | Harriger, LW (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. |
中文摘要 | We use inelastic neutron scattering to study temperature dependence of the paramagnetic spin excitations in iron pnictide BaFe2As2 throughout the Brillouin zone. In contrast to a conventional local moment Heisenberg system, where paramagnetic spin excitations are expected to have a Lorentzian function centered at zero energy transfer, the high-energy (h(omega) > 100 meV) paramagnetic spin excitations in BaFe2As2 exhibit spin-wave-like features up to at least 290 K (T = 2.1T(N)). Furthermore, we find that the sizes of the fluctuating magnetic moments (m(2)) approximate to 3.6 mu(2)(B) per Fe are essentially temperature independent from the antiferromagnetic ordered state at 0.05T(N) to 2.1T(N), which differs considerably from the temperature dependent fluctuating moment observed in the iron chalcogenide Fe1.1Te [Zaliznyak et al., Phys. Rev. Lett. 107, 216403 (2011)]. These results suggest unconventional magnetism and strong electron correlation effects in BaFe2As2. |
收录类别 | SCI |
资助信息 | US NSF [DMR-1063866]; MOST of China 973 programs [2012CB821400, 2011CBA00110]; [NSFC-11004233] |
语种 | 英语 |
公开日期 | 2013-09-23 |
内容类型 | 期刊论文 |
源URL | [http://ir.iphy.ac.cn/handle/311004/44778] ![]() |
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 | Harriger, LW,Liu, MS,Luo, HQ,et al. Temperature dependence of the paramagnetic spin excitations in BaFe2As2[J]. PHYSICAL REVIEW B,2012,86(14). |
APA | Harriger, LW.,Liu, MS.,Luo, HQ.,Ewings, RA.,Frost, CD.,...&Dai, PC.(2012).Temperature dependence of the paramagnetic spin excitations in BaFe2As2.PHYSICAL REVIEW B,86(14). |
MLA | Harriger, LW,et al."Temperature dependence of the paramagnetic spin excitations in BaFe2As2".PHYSICAL REVIEW B 86.14(2012). |
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