The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2

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	The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2
	Chen, F ; Ge, QQ ; Xu, M ; Zhang, Y ; Shen, XP ; Li, W ; Matsunami, M ; Kimura, S ; Hu, JP ; Feng, DL
刊名	CHINESE SCIENCE BULLETIN
	2012
卷号	57 期号:30 页码:3829
关键词	GAP
ISSN号	1001-6538
通讯作者	Feng, DL (reprint author), Fudan Univ, State Key Lab Surface Phys, Dept Phys, Shanghai 200433, Peoples R China.
中文摘要	The newly discovered iron-chalcogenide superconductor K (x) Fe2-y Se-2 exhibits a distinct electronic structure from other iron-based superconductors. Exploiting polarization-dependent angle-resolved photoemission spectroscopy, we have determined the orbital characters of band structure in a K (x) Fe2-y Se-2 superconductor. To a large extent, we find that K (x) Fe2-y Se-2 superconductor shares similar orbital characters with other iron-based superconductors, but with its own characteristics. For example, we have resolved two highly degenerate electron cylinders around the zone corner in the s and p geometries, respectively, indicating negligible interactions between them. Moreover, in contrast to the band calculation results, the small electron pocket around Z is found to be mainly consisted of the d (Z) orbital. The determined orbital characters would help to construct a realistic model for K (x) Fe2-y Se-2.
收录类别	SCI
资助信息	National Natural Science Foundation of China, Ministry of Education of China; National Basic Research Program of China [2012CB921400, 2011CB921802, 2011CBA00112]
语种	英语
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/45374]
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, F,Ge, QQ,Xu, M,et al. The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2[J]. CHINESE SCIENCE BULLETIN,2012,57(30):3829.
APA	Chen, F.,Ge, QQ.,Xu, M.,Zhang, Y.,Shen, XP.,...&Feng, DL.(2012).The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2.CHINESE SCIENCE BULLETIN,57(30),3829.
MLA	Chen, F,et al."The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2".CHINESE SCIENCE BULLETIN 57.30(2012):3829.