Analysis of laser angle-resolved photoemission spectra of Ba2Sr2CaCu2O8+delta in the superconducting state: Angle-resolved self-energy and the fluctuation spectrum

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	Analysis of laser angle-resolved photoemission spectra of Ba2Sr2CaCu2O8+delta in the superconducting state: Angle-resolved self-energy and the fluctuation spectrum
	Yun, JH ; Bok, JM ; Choi, HY ; Zhang, WT ; Zhou, XJ ; Varma, CM
刊名	PHYSICAL REVIEW B
	2011
卷号	84 期号:10
关键词	PHASE
ISSN号	1098-0121
通讯作者	Yun, JH: Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
中文摘要	We analyze the ultrahigh-resolution laser angle-resolved photoemission spectroscopy intensity from the slightly underdoped Bi2Sr2CaCu2O8+delta in the superconductive (SC) state. The momentum distribution curves were fitted at each energy omega employing the SC Green's function along several cuts perpendicular to the Fermi surface with the tilt angle theta with respect to the nodal cut. The clear observation of particle-hole mixing was utilized such that the complex self-energy as a function of omega is directly obtained from the fitting. The obtained angle-resolved self-energy is then used to deduce the Eliashberg function alpha F-2((+))(theta,omega) in the diagonal channel by inverting the d-wave Eliashberg equation using the maximum entropy method. Besides a broad featureless spectrum up to the cutoff energy omega(c), the deduced alpha F-2 exhibits two peaks around 0.05 and 0.015 eV. The former and the broad feature are already present in the normal state, while the latter emerges only below T-c. Both peaks become enhanced as T is lowered or the angle theta moves away from the nodal direction. The implication of these findings is discussed.
收录类别	SCI
资助信息	National Research Foundation (NRF) of Korea [NRF 2010-0010772]; NSF [DMR-0906530]
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/311004/33701]
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	Yun, JH,Bok, JM,Choi, HY,et al. Analysis of laser angle-resolved photoemission spectra of Ba2Sr2CaCu2O8+delta in the superconducting state: Angle-resolved self-energy and the fluctuation spectrum[J]. PHYSICAL REVIEW B,2011,84(10).
APA	Yun, JH,Bok, JM,Choi, HY,Zhang, WT,Zhou, XJ,&Varma, CM.(2011).Analysis of laser angle-resolved photoemission spectra of Ba2Sr2CaCu2O8+delta in the superconducting state: Angle-resolved self-energy and the fluctuation spectrum.PHYSICAL REVIEW B,84(10).
MLA	Yun, JH,et al."Analysis of laser angle-resolved photoemission spectra of Ba2Sr2CaCu2O8+delta in the superconducting state: Angle-resolved self-energy and the fluctuation spectrum".PHYSICAL REVIEW B 84.10(2011).