Vacancy ordering and phonon spectrum of the iron-based superconductor K0.8Fe1.6Se2

	Vacancy ordering and phonon spectrum of the iron-based superconductor K0.8Fe1.6Se2
	Zhang, AM ; Liu, K ; Xiao, JH ; He, JB ; Wang, DM ; Chen, GF ; Normand, B ; Zhang, QM
刊名	PHYSICAL REVIEW B
	2012
卷号	85 期号:2
关键词	AUGMENTED-WAVE METHOD
ISSN号	1098-0121
通讯作者	Zhang, AM (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
中文摘要	We have performed Raman-scattering measurements on a high-quality single crystal of the recently discovered Fe-based superconductor K0.8Fe1.6Se2 (T-c = 32 K). At least 13 phonon modes were observed in the wave number range 10-300 cm(-1). The spectra possess a fourfold symmetry indicative of bulk vacancy order in the Fe-deficient planes. We perform a vibration analysis based on first-principles calculations, which both confirms the ordered structure and allows a complete mode assignment. We observe an anomaly at T-c in the 180 cm(-1) A(g) mode, which indicates a rather specific type of electron-phonon coupling.
收录类别	SCI
资助信息	973 program [2011CBA00112]; NSF of China [11034012, 11004243]; Fundamental Research Funds for Central Universities; Renmin University
语种	英语
公开日期	2014-02-20
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57804]
专题	物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文
推荐引用方式 GB/T 7714	Zhang, AM,Liu, K,Xiao, JH,et al. Vacancy ordering and phonon spectrum of the iron-based superconductor K0.8Fe1.6Se2[J]. PHYSICAL REVIEW B,2012,85(2).
APA	Zhang, AM.,Liu, K.,Xiao, JH.,He, JB.,Wang, DM.,...&Zhang, QM.(2012).Vacancy ordering and phonon spectrum of the iron-based superconductor K0.8Fe1.6Se2.PHYSICAL REVIEW B,85(2).
MLA	Zhang, AM,et al."Vacancy ordering and phonon spectrum of the iron-based superconductor K0.8Fe1.6Se2".PHYSICAL REVIEW B 85.2(2012).