We study the evolution of the superconducting phases in a model with competing short-range attractive (W) and on-site repulsive (U) interactions. The influence of the correlations on the phase diagram of $s\ensuremath{-}$ and d-wave superconductors is studied by means of various approximations. The knowledge of the normal state correlation effects allows the tracking of the influence of U on the superconductivity in correlated systems. We have found the qualitatively different response of the superconducting phases in systems with $W<{U}_{\mathrm{cr}},$ when the system ceases to superconduct for large enough U, and in the limit of strong $W>{U}_{\mathrm{cr}},$ when the system remains superconducting for arbitrarily large U.We study the evolution of the superconducting phases in a model with competing short-range attractive (W) and on-site repulsive (U) interactions. The influence of the correlations on the phase diagram of $s\ensuremath{-}$ and d-wave superconductors is studied by means of various approximations. The knowledge of the normal state correlation effects allows the tracking of the influence of U on the superconductivity in correlated systems. We have found the qualitatively different response of the superconducting phases in systems with $W<{U}_{\mathrm{cr}},$ when the system ceases to superconduct for large enough U, and in the limit of strong $W>{U}_{\mathrm{cr}},$ when the system remains superconducting for arbitrarily large U.

Physical review. B, Condensed matterJan 1, 199915 citations

Superconductivity due to correlation effects

D. Schmeltzer

Physica C SuperconductivityJun 1, 19882 citations

Singlet pairing and superconductivity in t−J ladders with Mott insulating stripes

Chen Cheng, Rubem Mondaini, Marcos Rigol

Pairing in superconductors occurs in a variety of channels and can be produced by various mechanisms. Here, we show that, in the presence of strong correlations, a singlet-pair superconducting phase can occur in ladder geometries with the fermions in the pairs residing on different sides of a Mott insulating stripe. The antiferromagnet correlations in the Mott stripe provide the pairing ``glue'' in such a phase. We study, using the density matrix renormalization group method, the ground state of four-leg $t\ensuremath{-}J$ ladders with Mott insulating stripes in the inner two legs. Pairing and superconductivity are revealed by the presence of negative binding energies and by algebraically decaying interleg singlet-pair correlations, respectively.Pairing in superconductors occurs in a variety of channels and can be produced by various mechanisms. Here, we show that, in the presence of strong correlations, a singlet-pair superconducting phase can occur in ladder geometries with the fermions in the pairs residing on different sides of a Mott insulating stripe. The antiferromagnet correlations in the Mott stripe provide the pairing ``glue'' in such a phase. We study, using the density matrix renormalization group method, the ground state of four-leg $t\ensuremath{-}J$ ladders with Mott insulating stripes in the inner two legs. Pairing and superconductivity are revealed by the presence of negative binding energies and by algebraically decaying interleg singlet-pair correlations, respectively.

arXiv:1804.00670Physical review. B./Physical review. BSep 27, 20187 citations

Superconductivity from Strong Correlation in High-Temperature Superconductors

Takashi Yanagisawa, Mitake Miyazaki, Yamaji K.

Journal of Superconductivity and Novel MagnetismDec 9, 20152 citations

Superconductivity in correlated wavefunctions

Claudius Gros, Didier Poilblanc, Thomas Maurice Rice +1 more

Physica C SuperconductivityJun 1, 198824 citations

W<{U}_{\mathrm{cr}},

when the system ceases to superconduct for large enough U, and in the limit of strong

W>{U}_{\mathrm{cr}},

when the system remains superconducting for arbitrarily large U.