Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor

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	Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor
	Wray, LA ; Thomale, R ; Platt, C ; Hsieh, D ; Qian, D ; Chen, GF ; Luo, JL ; Wang, NL ; Hasan, MZ
刊名	PHYSICAL REVIEW B
	2012
卷号	86 期号:14
关键词	BA0.6K0.4FE2AS2 LAO1-XFXFEAS ORDER
ISSN号	1098-0121
通讯作者	Wray, LA: Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
中文摘要	We present a polarization-resolved study of the low-energy band structure in the optimally doped iron pnictide superconductor Ba0.6K0.4Fe2As2 (T-c = 37 K) using angle-resolved photoemission spectroscopy. Polarization-contrasted measurements are used to identify and trace all three low-energy holelike bands predicted by local density approximation (LDA) calculations. The photoemitted electrons reveal an inconsistency with LDA-predicted symmetries along the Gamma-X high-symmetry momentum axis, due to unexpectedly strong rotational anisotropy in electron kinetics. We evaluate many-body effects such as Mott-Hubbard interactions, which are likely to underlie the anomaly, and discuss how the observed deviations from LDA band structure affect the energetics of iron pnictide Cooper pairing in the hole-doped regime.
收录类别	SCI
资助信息	SITP fellowship by Stanford University; US Department of Energy (DOE) Office of Science, Office of Basic Energy Sciences [DE-AC02-05CH11231, DE-AC02-06CH11357]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/35896]
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	Wray, LA,Thomale, R,Platt, C,et al. Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor[J]. PHYSICAL REVIEW B,2012,86(14).
APA	Wray, LA.,Thomale, R.,Platt, C.,Hsieh, D.,Qian, D.,...&Hasan, MZ.(2012).Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor.PHYSICAL REVIEW B,86(14).
MLA	Wray, LA,et al."Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor".PHYSICAL REVIEW B 86.14(2012).