Bare electron dispersion from experiment: Self-consistent self-energy analysis of photoemission data

被引：113

作者：

Kordyuk, AA

Borisenko, SV

Koitzsch, A

Fink, J

Knupfer, M

Berger, H

机构：

[1] IFW Dresden, Inst Solid State Res, D-01069 Dresden, Germany

[2] Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine

[3] Ecole Polytech Fed Lausanne, Inst Phys & Complex Matter, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.71.214513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Performing an in-depth analysis of the photoemission spectra along the nodal direction of the high-temperature superconductor Bi-2212 we developed a procedure to determine the underlying electronic structure and established a precise relation of the measured quantities to the real and imaginary parts of the self-energy of electronic excitations. The self-consistency of the procedure with respect to the Kramers-Kronig transformation allows us to draw conclusions on the applicability of the spectral function analysis and on the existence of well-defined quasiparticles along the nodal direction even for the underdoped Bi-2212 in the pseudogap state. The analysis of the real part of the self-energy Sigma'(omega) for an overdoped and underdoped Bi- 2212 helps to distinguish the 70 meV "kink" from Sigma'(omega) maximum and conclude about doping dependence of the kink strength.

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页数：11

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