The 'unusual' isotope shift in high-temperature superconductors can be explained by the usual theory of the electron-phonon interaction

摘要

We show that recent ARPES results on the "unusual" oxygen isotope shift inthe real part of the self-energy in the optimally doped $Bi2212$ samples can bequalitatively (and semi-quantitatively) explained by the theory of theelectron-phonon interaction (EPI) elaborated few decades ago. However, for aquantitative analysis of the ARPES spectra it is necessary to know the momentumdependence of the EPI, the Coulomb contribution at high energies and thebackground due to impurities and defects.