Iron Isotope Effect and Local Lattice Dynamics in the (Ba, K)Fe2As2 Superconductor Studied by Temperature-Dependent EXAFS

	Iron Isotope Effect and Local Lattice Dynamics in the (Ba, K)Fe2As2 Superconductor Studied by Temperature-Dependent EXAFS
	Chu, WS; Cheng, J; Chu WS(储旺盛); Cheng J(程杰); Chu SQ(储胜启); Hu TD(胡天斗); 吴自玉;Chu, SQ; Hu, TD; Marcelli, A; Chen, XH
刊名	SCIENTIFIC REPORTS
	2013
卷号	3 页码:1750
英文摘要	Currently available investigations of the isotope effect in Fe-based superconductors are all based on macroscopic resistivity and susceptibility measurements and results are highly controversial. Here we present an investigation of the Fe isotope effect in the (Ba, K)Fe2As2 superconductor by temperature-dependent EXAFS in the framework of Einstein model. This method separates the static structural isotope contribution and the local lattice isotope contribution. Results point out the isotope substitution has a negligible effect on inter-atomic distances. On the contrary, both the local vibrations of the Fe-As and the Fe-Fe bonds show strong iron isotope dependence, which is a marker of an "intrinsic'' isotope effect. This bulk iron isotope contribution to the local lattice dynamics suggests the local phonons play an important role in the (Ba, K)Fe2As2 superconductor and a three-dimensional electron-phonon interaction should be considered to understand the superconducting mechanism of iron-based superconductors.
学科主题	Science & Technology - Other Topics
收录类别	SCI
WOS记录号	WOS:000318145200011
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224445]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Chu, WS,Cheng, J,Chu WS,et al. Iron Isotope Effect and Local Lattice Dynamics in the (Ba, K)Fe2As2 Superconductor Studied by Temperature-Dependent EXAFS[J]. SCIENTIFIC REPORTS,2013,3:1750.
APA	Chu, WS.,Cheng, J.,储旺盛.,程杰.,储胜启.,...&Wu, ZY.(2013).Iron Isotope Effect and Local Lattice Dynamics in the (Ba, K)Fe2As2 Superconductor Studied by Temperature-Dependent EXAFS.SCIENTIFIC REPORTS,3,1750.
MLA	Chu, WS,et al."Iron Isotope Effect and Local Lattice Dynamics in the (Ba, K)Fe2As2 Superconductor Studied by Temperature-Dependent EXAFS".SCIENTIFIC REPORTS 3(2013):1750.