Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal
文献类型：期刊论文
| 作者 | Chen, RY ; Dong, T ; Wang, HP ; Wang, NL |
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2013 |
| 卷号 | 56期号:12页码:2395 |
| 关键词 | ultrafast LaOFeAs spin-density-wave (SDW) |
| ISSN号 | 1674-7348 |
| 通讯作者 | Wang, NL (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Ultrafast quasiparticle dynamics of single. crystalline LaOFeAs were investigated by pump-probe measurement. The compound experiences structural and spin-density-wave (SDW) phase transitions at 150 K (T-S1) and 130 K (T-S2), respectively. The relaxation time of quasiparticles was somewhat temperature independent at high temperature but exhibited a sharp upturn at T-S1 and reached the maximum at approximately T-S2. The remarkable slowing down of quasiparticle relaxation time is caused by the formation of energy gap. By employing the Rothwarf-Taylor model analysis, we found that there should be already energy gaps opening just below the structural transition. The magnitude of SDW gap was identified to be 72 meV. |
| 资助信息 | National Science Foundation of China [2011CB921701]; National Basic Research Program of China [2012CB821403] |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57642]  |
| 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 | Chen, RY,Dong, T,Wang, HP,et al. Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2013,56(12):2395. |
| APA | Chen, RY,Dong, T,Wang, HP,&Wang, NL.(2013).Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,56(12),2395. |
| MLA | Chen, RY,et al."Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 56.12(2013):2395. |
入库方式： OAI收割
来源：物理研究所
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