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

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

2006-05-03

arxiv.org/abs/cond-mat/0605100v1

Phys. Rev. B 74, 172509 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 revtex pages, 4 figures

Scientific paper

10.1103/PhysRevB.74.172509

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.

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