Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2

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	Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2
	Xu, N ; Richard, P ; Wang, XP ; Shi, X ; van Roekeghem, A ; Qian, T ; Ieki, E ; Nakayama, K ; Sato, T ; Rienks, E ; Thirupathaiah, S ; Xing, J ; Wen, HH ; Shi, M ; Takahashi, T ; Ding, H
刊名	PHYSICAL REVIEW B
	2013
卷号	87 期号:9
ISSN号	1098-0121
通讯作者	Xu, N (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We used high-energy resolution angle-resolved photoemission spectroscopy to extract the momentum dependence of the superconducting gap of Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2 (T-c = 15 K). Despite a strong out-of-plane warping of the Fermi surface, the magnitude of the superconducting gap observed experimentally is nearly isotropic and independent of the out-of-plane momentum. More precisely, we respectively observed 5.7 and 4.5 meV superconducting gaps on the inner and outer Gamma-centered hole Fermi surface pockets, whereas a 4.8 meV gap is recorded on the M-centered electron Fermi surface pockets. Our results are consistent with the J(1)-J(2) model with a dominant antiferromagnetic exchange interaction between the next-nearest Fe neighbors. DOI: 10.1103/PhysRevB.87.094513
资助信息	CAS [2010Y1JB6]; MOST [2010CB923000, 2011CBA001000, 2011CBA00102, 2012CB821403]; NSFC from China [10974175, 11004232, 11034011/A0402]; JSPS; TRiP-JST; CREST-JST; MEXT of Japan; Cai Yuanpei program; French ANR (project PNICTIDES); Sino-Swiss Science and Technology Cooperation [IZLCZ2 138954]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/56773]
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	Xu, N,Richard, P,Wang, XP,et al. Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2[J]. PHYSICAL REVIEW B,2013,87(9).
APA	Xu, N.,Richard, P.,Wang, XP.,Shi, X.,van Roekeghem, A.,...&Ding, H.(2013).Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2.PHYSICAL REVIEW B,87(9).
MLA	Xu, N,et al."Angle-resolved photoemission observation of isotropic superconducting gaps in isovalent Ru-substituted Ba(Fe0.75Ru0.25)(2)As-2".PHYSICAL REVIEW B 87.9(2013).