Interplay between electron-phonon and Coulomb interactions in cuprates
نویسنده
چکیده
Evidence for strong electron-phonon coupling in high-Tc cuprates is reviewed, with emphasis on the electron and phonon spectral functions. Effects due to the interplay between the Coulomb and electron-phonon interactions are studied. For weakly doped cuprates, the phonon self-energy is strongly reduced due to correlation effects, while there is no corresponding strong reduction for the electron selfenergy. Polaron formation is studied, focusing on effects of Coulomb interaction and antiferromagnetic correlations. It is argued that experimental indications of polaron formation in undoped cuprates are due to a strong electron-phonon interaction for these systems. PACS numbers: 74.72.-h,71.38.-k,71.10.Fd Interplay between electron-phonon and Coulomb interactions in cuprates 2
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