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

Bare electron dispersion from experiment: Self-consistent self-energy analysis of photoemission data 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 Σ ′ ( ω ) for an overdoped and underdoped Bi-2212 helps to distinguish the 70 meV “kink” from Σ ′ ( ω ) maximum and conclude about doping dependence of the kink strength. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

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

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References (2)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2005 The American Physical Society
ISSN
1550-235X
DOI
10.1103/PhysRevB.71.214513
Publisher site
See Article on Publisher Site

Abstract

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 Σ ′ ( ω ) for an overdoped and underdoped Bi-2212 helps to distinguish the 70 meV “kink” from Σ ′ ( ω ) maximum and conclude about doping dependence of the kink strength.

Journal

Physical Review B – American Physical Society (APS)

Published: Jun 1, 2005

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