Abstract
Electron–phonon interaction in cuprate oxides is consistently determined from realistic multi band p–d model in strong correlations limit. We consider the momenta dependence matrix elements of the EPI for modes which most coupled to electrons and analyze a possible mechanism of kink formation. By unitary transformation we obtain an effective low-energy single-band Hamiltonian that includes only electron–electron interactions renormalized by the electron–phonon coupling and depends on occupation factors.
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