Temperature and compression effects on electron heat capacity and   electron-phonon coupling in aluminum and beryllium: Insights from ab   initio simulations

doi:10.1063/1.4935843

CORC > 北京大学 > 工学院

	Temperature and compression effects on electron heat capacity and electron-phonon coupling in aluminum and beryllium: Insights from ab initio simulations
	Li, Zi ; Wang, Cong ; Kang, Wei ; Li, Chuanying ; Zhang, Ping
刊名	PHYSICS OF PLASMAS
	2015
关键词	FUNCTIONAL PERTURBATION-THEORY TRANSITION-TEMPERATURE ENERGY RELAXATION METAL-SURFACES SUPERCONDUCTORS FEMTOSECOND PSEUDOPOTENTIALS DEPENDENCE PHYSICS SOLIDS
DOI	10.1063/1.4935843
英文摘要	Ultrafast laser experiments on metals usually induce a high electron temperature and a low ion temperature and, thus, an energy relaxation process. The electron heat capacity and electron-phonon coupling factor are crucial thermal quantities to describe this process. We perform ab initio theoretical studies to determine these thermal quantities and their dependence on density and electron temperature for the metals aluminum and beryllium. The heat capacity shows an approximately linear dependence on the temperature, similar to free electron gas, and the compression only slightly affects the capacity. The electron-phonon coupling factor increases with both temperature and density, and the change observed for beryllium is more obvious than that for aluminum. The connections between thermal quantities and electronic/atomic structures are discussed in detail, and the different behaviors of aluminum and beryllium are well explained. (C) 2015 AIP Publishing LLC.; National Natural Science Foundation of China [11475031, 11275032, 11005012, 11274019]; Foundation for Development of Science and Technology of China Academy of Engineering Physics [2013B0102019]; Chinese Academy of Engineering Physics [2014-1-036]; SCI(E); EI; ARTICLE; zhang_ping@iapcm.ac.cn; 11; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435910]
专题	工学院
推荐引用方式 GB/T 7714	Li, Zi,Wang, Cong,Kang, Wei,et al. Temperature and compression effects on electron heat capacity and electron-phonon coupling in aluminum and beryllium: Insights from ab initio simulations[J]. PHYSICS OF PLASMAS,2015.
APA	Li, Zi,Wang, Cong,Kang, Wei,Li, Chuanying,&Zhang, Ping.(2015).Temperature and compression effects on electron heat capacity and electron-phonon coupling in aluminum and beryllium: Insights from ab initio simulations.PHYSICS OF PLASMAS.
MLA	Li, Zi,et al."Temperature and compression effects on electron heat capacity and electron-phonon coupling in aluminum and beryllium: Insights from ab initio simulations".PHYSICS OF PLASMAS (2015).