Low-energy Ce spin excitations in CeFeAsO and CeFeAsO0.84F0.16
文献类型：期刊论文
| 作者 | Li, SL ; Yao, DX ; Qiu, YM ; Kang, HJ ; Carlson, EW ; Hu, JP ; Chen, GF ; Wang, NL ; Dai, PC |
| 刊名 | FRONTIERS OF PHYSICS IN CHINA
 |
| 出版日期 | 2010 |
| 卷号 | 5期号:2页码:161 |
| 关键词 | SUPERCONDUCTIVITY WAVES PR SM |
| ISSN号 | 1673-3487 |
| 通讯作者 | Li, SL: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We use inelastic neutron scattering to study the low-energy spin excitations of polycrystalline samples of nonsuperconducting CeFeAsO and superconducting CeFeAsO0.84F0.16. Two sharp dispersionless modes are found at 0.85 and 1.16 meV in CeFeAsO below the Ce antiferromagnetic (AF) ordering temperature of T-N(Ce) similar to 4 K. On warming to above T-N(Ce) similar to 4 K, these two modes become one broad dispersionless mode that disappears just above the Fe ordering temperature T-N(Fe) similar to 140 K. For superconducting CeFeAsO0.84F0.16, where Fe static AF order is suppressed, we find a weakly dispersive mode center at 0.4 meV that may arise from short-range Ce-Ce exchange interactions. Using a Heisenberg model, we simulate powder-averaged Ce spin wave excitations. Our results show that we need both Ce spin wave and crystal electric field excitations to account for the whole spectra of low-energy spin excitations. |
| 收录类别 | SCI |
| 资助信息 | US Department of Energy, Division of Materials Science, Basic Energy Sciences [DOE DE-FG02-05ER46202]; Chinese Academy of Sciences; National Science Foundation [DMR-0454672] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41024]  |
| 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,Yao, DX,Qiu, YM,et al. Low-energy Ce spin excitations in CeFeAsO and CeFeAsO0.84F0.16[J]. FRONTIERS OF PHYSICS IN CHINA,2010,5(2):161. |
| APA | Li, SL.,Yao, DX.,Qiu, YM.,Kang, HJ.,Carlson, EW.,...&Dai, PC.(2010).Low-energy Ce spin excitations in CeFeAsO and CeFeAsO0.84F0.16.FRONTIERS OF PHYSICS IN CHINA,5(2),161. |
| MLA | Li, SL,et al."Low-energy Ce spin excitations in CeFeAsO and CeFeAsO0.84F0.16".FRONTIERS OF PHYSICS IN CHINA 5.2(2010):161. |
入库方式： OAI收割
来源：物理研究所
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