Abstract
A microscopical theory of spin-fluctuation superconducting pairing in systems with strong electron correlations as high-temperature superconductors is formulated. Basic models with strong electron correlations: p-d model, Hubbard and t-J models are considered. The Dyson equations for the matrix Green functions in the Nambu notation for the Hubbard operators are derived. The equations are solved in the self-consistent Born approximation and quasi-particle spectra and superconducting Tc are calculated. By comparison the results for the Hubbard and t-J models it is shown that the antiferromagnetic superexchange interaction acting in a broad energy region with negligible retardation effects gives the major contribution to the superconducting pairing. We argue that spin-fluctuations which have been observed in many experiments in cuprates are the driving force for superconducting pairing in high-temperature superconductors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
