Interplay of electron-phonon interaction and strong correlations: DMFT+Σstudy

Details Interplay of electron-phonon interaction and strong correlations: DMFT+Σstudy Interplay of electron-phonon interaction and strong correlations: DMFT+Σstudy

2009-06-21

arxiv.org/abs/0906.3865v1

Phys. Rev. B 80, 115124 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 8 figures

Scientific paper

10.1103/PhysRevB.80.115124

We perform investigation of Hubbard model with interaction between strongly correlated conducting electrons on a lattice with Debye phonons. To solve the problem generalized dynamical mean-field DMFT+\Sigma method is employed with "external" self-energy \Sigma_ph corresponding to electron-phonon interaction. We present DMFT+\Sigma_ph results for densities of states and kinks in energy dispersions for a variety of model parameters, analyzing the interplay of recently discovered kinks of purely electronic nature and usual phonon kinks in the electronic spectrum.

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