Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors

Abstract

We have computed alpha^2F's for the hole-doped cuprates within the framework of the one-band Hubbard model, where the full magnetic response of the system is treated properly. The d-wave pairing weight alpha^2F_d is found to contain not only a low energy peak due to excitations near (pi,pi) expected from neutron scattering data, but to also display substantial spectral weight at higher energies due to contributions from other parts of the Brillouin zone as well as pairbreaking ferromagnetic excitations at low energies. The resulting solutions of the Eliashberg equations yield transition temperatures and gaps comparable to the experimentally observed values, suggesting that magnetic excitations of both high and low energies play an important role in providing the pairing glue in the cuprates.

arXiv commentTo be published, PRB; 6 eps figures, revtex

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• Optical model-solution to the competition between a pseudogap phase and a Mott-gap phase in high-temperature cuprate superconductors
• Evolution of the dynamical pairing across the phase diagram of a strongly correlated high-temperature superconductor
• Failure of t-J models in describing doping evolution of spectral weight in x-ray scattering, optical and photoemission spectra of the cuprates
• Reconstructing the bulk Fermi surface and the superconducting gap properties from Neutron Scattering experiments
• Superconducting phase diagram of itinerant antiferromagnets
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• Self Energy and Fluctuation Spectra in Cuprates: Comparing Optical and Photoemission Results
• Origin of pressure induced second superconducting dome in AyFe2-xSe2 [A=K, (Tl,Rb)]
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