Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors

Details Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors Magnetic mechanism of quasiparticle pairing in hole-doped cuprate superconductors

2008-09-22

arxiv.org/abs/0809.3658v1

Physics

Condensed Matter

Superconductivity

To be published, PRB; 6 eps figures, revtex

Scientific paper

10.1103/PhysRevB.78.134513

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.

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