| Recent angle-resolved photoemission spectroscopy (ARPES) measurements on HTSC oxides whose contributions are intra-band show a kink in the quasiparticle spectrum at characteristic phonon frequencies in the normal and superconducting state reveling a strong correlation between electrons and a intermediate bosson. In contrast with our theoretical discussion, we include our theoretical results for the renormalized energy Ek as a function of the bare band energy ek compared with ARPES spectroscopies in Pb, OD-Bi2212, and OD-Y123, with different spectral functions associated to different boson exchange mechanism. |
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