Coexistence of Two Sharp-Mode Couplings and their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+delta Revealed by Laser-Based Angle-Resolved Photoemission

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	Coexistence of Two Sharp-Mode Couplings and their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+delta Revealed by Laser-Based Angle-Resolved Photoemission
	He, JF ; Zhang, WT ; Bok, JM ; Mou, DX ; Zhao, L ; Peng, YY ; He, SL ; Liu, GD ; Dong, XL ; Zhang, J ; Wen, JS ; Xu, ZJ ; Gu, GD ; Wang, XY ; Peng, QJ ; Wang, ZM ; Zhang, SJ ; Yang, F ; Chen, CT ; Xu, ZY ; Choi, HY ; Varma, CM ; Zhou, XJ
刊名	PHYSICAL REVIEW LETTERS
	2013
卷号	111 期号:10
ISSN号	0031-9007
通讯作者	He, JF (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China.
中文摘要	High-resolution laser-based angle-resolved photoemission measurements have been carried out on Bi2Sr2CaCu2O8+delta (Bi2212) superconductors to investigate momentum dependence of electron coupling with collective excitations (modes). Two coexisting energy scales are clearly revealed over a large momentum space for the first time in the superconducting state of the overdoped Bi2212 superconductor. These two energy scales exhibit distinct momentum dependence: one keeps its energy near 78 meV over a large momentum space while the other changes its energy from similar to 40 meV near the antinodal region to similar to 70 meV near the nodal region. These observations provide a new picture on momentum evolution of electron-boson coupling in Bi2212 that electrons are coupled with two sharp modes simultaneously over a large momentum space in the superconducting states. Their unusual momentum dependence poses a challenge to our current understanding of electron-mode-coupling and its role for high-temperature superconductivity in cuprate superconductors.
资助信息	NSFC [11190022]; MOST of China [2011CB921703, 2011CB605903]; DOE [DE-AC02-98CH10886]
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/311004/56818]
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	He, JF,Zhang, WT,Bok, JM,et al. Coexistence of Two Sharp-Mode Couplings and their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+delta Revealed by Laser-Based Angle-Resolved Photoemission[J]. PHYSICAL REVIEW LETTERS,2013,111(10).
APA	He, JF.,Zhang, WT.,Bok, JM.,Mou, DX.,Zhao, L.,...&Zhou, XJ.(2013).Coexistence of Two Sharp-Mode Couplings and their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+delta Revealed by Laser-Based Angle-Resolved Photoemission.PHYSICAL REVIEW LETTERS,111(10).
MLA	He, JF,et al."Coexistence of Two Sharp-Mode Couplings and their Unusual Momentum Dependence in the Superconducting State of Bi2Sr2CaCu2O8+delta Revealed by Laser-Based Angle-Resolved Photoemission".PHYSICAL REVIEW LETTERS 111.10(2013).