2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126958In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. The incoherent nature of the spectra suggests that the hopping-dominated dispersion occurs possibly with the assistance of local spin correlations. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate in the low energy region. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.4 pages, 3 figures, submitted to Phys. Rev. Lett. on May 21, 2006SuperconductivityStrongly Correlated Electronstext