Electron-Phonon Interaction and Antiferromagnetic Correlations

2006/02/26 by Giorgio Sangiovanni, G. Sangiovanni, O. Gunnarsson +5 · 6 citations
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.97.046404

published as Phys. Rev. Lett. 97, 046404 (2006) · 4 pages and 5 figures

arxiv created 2006/02/26 · openalex publication_date 2006/07/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• Neutron Spectroscopy of Superconductors
• Polaron Crossover and Bipolaronic Metal-Insulator Transition in the Half-Filled Holstein Model
• Phase Separation Close to the Density-Driven Mott Transition in the Hubbard-Holstein Model
• Electron-Phonon Interaction Close to a Mott Transition

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