Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2
文献类型：期刊论文
| 作者 | Wang, MY ; Lu, XY ; Ewings, RA ; Harriger, LW ; Song, Y ; Carr, SV ; Li, CH ; Zhang, R ; Dai, PC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2013 |
| 卷号 | 87期号:6 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wang, MY (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. |
| 中文摘要 | We use neutron scattering to study temperature-dependent spin excitations in insulating antiferromagnetic (AF) Rb0.8Fe1.6Se2. In the low-temperature AF state, spin waves can be accurately described by a local moment Heisenberg Hamiltonian. On warming to around the Neel temperature of T-N = 500 K, low-energy (E < 30 meV) paramagnetic spin excitations form Lorentzian-like quasielastic peaks centered at the AF wave vectors associated with spin waves, while high-energy (E > 50 meV) spin excitations become heavily damped. Upon further warming to above the structural distortion temperature of T-s = 524 K, the entire paramagnetic excitations become overdamped. These results suggest that AF Rb0.8Fe1.6Se2 is not a copper-oxide-like Mott insulator and has less electron correlations compared with metallic iron pnictides and iron chalcogenides. DOI: 10.1103/PhysRevB.87.064409 |
| 资助信息 | US DOE BES [DE-FG02-05ER46202]; MOST of China 973 programs [2012CB821400, 2011CBA00110]; [NSFC-51002180] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57317]  |
| 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 | Wang, MY,Lu, XY,Ewings, RA,et al. Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2[J]. PHYSICAL REVIEW B,2013,87(6). |
| APA | Wang, MY.,Lu, XY.,Ewings, RA.,Harriger, LW.,Song, Y.,...&Dai, PC.(2013).Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2.PHYSICAL REVIEW B,87(6). |
| MLA | Wang, MY,et al."Paramagnetic spin excitations in insulating Rb0.8Fe1.6Se2".PHYSICAL REVIEW B 87.6(2013). |
入库方式： OAI收割
来源：物理研究所
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