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Suppression of superconductivity in the Hubbard model by buckling and breathing phonons

Alexandru Macridin·Brian Moritz·Mark Jarrell·Thomas Maier
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Abstract

We study the effect of buckling and breathing phonons, relevant for cuprate superconductors, on the d-wave superconductivity in the two-dimensional Hubbard model by employing dynamical cluster Monte Carlo calculations. The interplay of electronic correlations and the electron-phonon interaction produces two competing effects, an enhancement of the effective d-wave pairing interaction, which favors d-wave superconductivity, and a strong renormalization of the single-particle propagator, which suppress superconductivity. Due to the later effect we find that buckling and breathing phonons suppress the superconductivity in the region of parameter space relevant for cuprate superconductors.

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Alexandru Macridin, Brian Moritz, Mark Jarrell, Thomas Maier. 2006-11-03. Suppression of superconductivity in the Hubbard model by buckling and breathing phonons. https://doi.org/10.1088/0953-8984%2F24%2F47%2F475603

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