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

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

2004-09-20

arxiv.org/abs/cond-mat/0409506v1

Physics

Condensed Matter

Superconductivity

5 pages and 2 figures

Scientific paper

10.1103/PhysRevB.72.104519

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 \omega_0 and with enhanced scattering at wave-vector q_c. It is shown that a mass dependence of \omega_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.

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