Electron-Phonon Interaction and Antiferromagnetic Correlations

G. Sangiovanni, O. Gunnarsson, E. Koch, C. Castellani, and M. Capone

Phys. Rev. Lett. 97, 046404 – Published 26 July 2006; Erratum Phys. Rev. Lett. 97, 059901 (2006)

Abstract

We study effects of the Coulomb repulsion on the electron-phonon interaction (EPI) in the Holstein-Hubbard model, using the antiferromagnetic (AF) dynamical mean-field approximation. AF correlations strongly enhance EPI effects on the electron Green’s function with respect to the paramagnetic correlated system, but the net effect of the Coulomb interaction is a moderate suppression of the EPI. Doping leads to additional suppression. In contrast, the Coulomb interaction strongly suppresses EPI effects on phonons, but the suppression weakens with doping.

Received 24 February 2006
Publisher error corrected 28 July 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.046404

Corrections

28 July 2006

Erratum

Publisher’s Note: Electron-Phonon Interaction and Antiferromagnetic Correlations [Phys. Rev. Lett. 97, 046404 (2006)]

G. Sangiovanni, O. Gunnarsson, E. Koch, C. Castellani, and M. Capone

Phys. Rev. Lett. 97, 059901 (2006)

Authors & Affiliations

G. Sangiovanni¹, O. Gunnarsson¹, E. Koch², C. Castellani³, and M. Capone^4,3

¹Max-Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
²Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany
³Dipartimento di Fisica Università di Roma “La Sapienza” piazzale Aldo Moro 5, I-00185 Roma, Italy
⁴INFM-SMC and Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via dei Taurini 19, I-00185 Roma, Italy

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Issue

Vol. 97, Iss. 4 — 28 July 2006

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