Theory of isotope effect in photoemission spectra of high-T_c superconducting cuprates

Abstract

We investigate the effect of isotope substitution on the electronic spectral functions within a model where the charge carriers are coupled to bosonic charge-order (CO) fluctuations centered around some mean frequency ω_0 and with enhanced scattering at wave-vector q_c. It is shown that a mass dependence of ω_0 is not sufficient in order to account, especially at high energies, for the dispersion shifts experimentally observed in an optimally doped superconducting cuprate. We argue that isotope substitution induces a change of the spatial CO correlations which gives good account of the experimental data.

5 pages and 2 figures

References in corpus (2)

• An unusual isotope effect in a high-transition-temperature superconductor
• Strong Influence of Phonons on the Electron Dynamics of Bi2212

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