Electron-Phonon Interaction in thet−JModel

2003/08/31 by O. Rösch, O. Gunnarsson · 5 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.92.146403

published as Phys. Rev. Lett. 92, 146403 (2004) · 4 pages, RevTeX, 3 eps figures; final version with minor corrections

openalex publication_date 2004/04/08 · arxiv created 2004/05/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We derive a t-J model with electron-phonon coupling from the three-band model, considering modulation of both hopping and Coulomb integrals by phonons. While the modulation of the hopping integrals dominates, the modulation of the Coulomb integrals cannot be neglected. The model explains the experimentally observed anomalous softening of the half-breathing mode upon doping and a weaker softening of the breathing mode. It is shown that other phonons are not strongly influenced, and, in particular, the coupling to a buckling mode is not strong in this model.

Citations

• dx2−y2symmetry and the pairing mechanism

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