Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal

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	Ultrafast quasiparticle dynamics in spin-density-wave LaOFeAs single crystal
	Chen, RY ; Dong, T ; Wang, HP ; Wang, NL
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	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
内容类型	期刊论文
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.