Abstract
Abstract We have studied the role of on-site electronic correlation on the band structure of Bi2Sr2CaCu2O8. In our approach, an ab initio calculation supplies for the single particle starting point, on top of which self-energy effects are explicitly taken into account in the framework of the three-body scattering theory (3BS). We observe that correlation modifies the energy dispersion of hole quasiparticle states near the Fermi level, especially close to the X and M ¯ symmetry points, but does not induce sensible changes at the Fermi level. To sustain this picture, we report calculations of effective masses.
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