Interplay between electron-phonon and Coulomb interactions in cuprates

Details Interplay between electron-phonon and Coulomb interactions in cuprates Interplay between electron-phonon and Coulomb interactions in cuprates

2007-08-10

arxiv.org/abs/0708.1407v1

J. Phys.: Condens. Matter 20, 043201 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

43 pages and 22 figures

Scientific paper

10.1088/0953-8984/20/04/043201

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 self-energy. 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.

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