Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2

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	Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2
	Shi, YB ; Huang, YB ; Wang, XP ; Shi, X ; Roekeghem, AV ; Zhang, WL ; Xu, N ; Richard, P ; Qian, T ; Rienks, E ; Thirupathaiah, S ; Zhao, K ; Jin, CQ ; Shi, M ; Ding, H
刊名	CHINESE PHYSICS LETTERS
	2014
卷号	31 期号:6
ISSN号	0256-307X
通讯作者	Richard, P (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We report an angle-resolved photoemission investigation of optimally doped Ca0.33Na0.67Fe2As2. The Fermi surface topology of this compound is similar to that of the well-studied Ba0.6K0.4Fe2As2 material, except for larger hole pockets resulting from a higher hole concentration per Fe atoms. We find that the quasi-nesting conditions are weakened in this compound compared to Ba0.6K0.4Fe2As2. Similar to Ba0.6K0.4Fe2As2, we observe nearly isotropic superconducting gaps with Fermi surface-dependent magnitudes for Ca0.33Na0.67Fe2As2. A small variation in the gap size along the momentum direction perpendicular to the surface is found for one of the Fermi surfaces. Our superconducting gap results on all Fermi surface sheets fit simultaneously very well to a global gap function derived from a strong coupling approach, which contains only 2 global parameters.
资助信息	Chinese Academy of Sciences [2010Y1JB6]; National Basic Research Program of China [2010CB923000, 2011CBA001000, 2013CB921703]; National Natural Science Foundation of China [11004232, 11050110422, 11234014, 11274362]; Sino-Swiss Science and Technology Cooperation [IZLCZ2 138954]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59034]
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	Shi, YB,Huang, YB,Wang, XP,et al. Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2[J]. CHINESE PHYSICS LETTERS,2014,31(6).
APA	Shi, YB.,Huang, YB.,Wang, XP.,Shi, X.,Roekeghem, AV.,...&Ding, H.(2014).Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2.CHINESE PHYSICS LETTERS,31(6).
MLA	Shi, YB,et al."Observation of Strong-Coupling Pairing with Weakened Fermi-Surface Nesting at Optimal Hole Doping in Ca0.33Na0.67Fe2As2".CHINESE PHYSICS LETTERS 31.6(2014).