Unadulterated spectral function of low energy quasiparticles: Bi-2212, nodal direction

Abstract

Fitting the momentum distribution photoemission spectra to the Voigt profile appears to be a robust procedure to purify the interaction effects from the experimental resolution. In application to Bi-2212 high-Tc cuprates, the procedure reveals the true scattering rate at low binding energies and temperatures, and, consequently, the true value of the elastic scattering. Reaching the minimal value ~ 16 meV, the elastic scattering does not reveal a systematic dependence on doping level, but is rather sensitive to impurity concentration, and can be explained by the forward scattering on out-of-plane impurities. The inelastic scattering is found to form well-defined quasiparticles with the quadratic and cubic energy dependence of the scattering rate above and below Tc, respectively. The observed energy-temperature asymmetry of the scattering rate is also discussed.

4 revtex pages, 4 figures

References in corpus (6)

• Laser ARPES, the sudden approximation, and quasiparticle-like peaks in Bi2Sr2CaCu2O8+delta
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime in superconducting cuprates
• Evidence for CuO conducting band splitting in the nodal direction of Bi-2212
• Nodal Quasiparticle Lifetimes in Cuprate Superconductors

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• An ARPES view on the high-Tc problem: phonons vs spin-fluctuations
• Temperature-dependent Fermi surface of 2H-TaSe2 driven by competing density wave order fluctuations