High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy
	Wang, NL ; Hu, WZ ; Chen, ZG ; Yuan, RH ; Li, G ; Chen, GF ; Xiang, T
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2012
卷号	24 期号:29
关键词	IRON PNICTIDES SYSTEMS ELECTRONS
ISSN号	0953-8984
通讯作者	Wang, NL: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	The thermal conductivity of free-standing silicon nanowires (SiNWs) with diameters from 1-3 nm has been studied by using the one-dimensional Boltzmann's transport equation. Our model explicitly accounts for the Umklapp scattering process and electron-phonon coupling effects in the calculation of the phonon scattering rates. The role of the electron-phonon coupling in the heat transport is relatively small for large silicon nanowires. It is found that the effect of the electron-phonon coupling on the thermal conduction is enhanced as the diameter of the silicon nanowires decreases. Electrons in the conduction band scatter low-energy phonons effectively where surface modes dominate, resulting in a smaller thermal conductivity. Neglecting the electron-phonon coupling leads to overestimation of the thermal transport for ultra-thin SiNWs. The detailed study of the phonon density of states from the surface atoms and central atoms shows a better understanding of the nontrivial size dependence of the heat transport in silicon nanowire.
收录类别	SCI
资助信息	NSFC; CAS; MOST of China
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/39186]
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, NL,Hu, WZ,Chen, ZG,et al. High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2012,24(29).
APA	Wang, NL.,Hu, WZ.,Chen, ZG.,Yuan, RH.,Li, G.,...&Xiang, T.(2012).High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy.JOURNAL OF PHYSICS-CONDENSED MATTER,24(29).
MLA	Wang, NL,et al."High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy".JOURNAL OF PHYSICS-CONDENSED MATTER 24.29(2012).