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- W1866058727 abstract "We examine the paper basic equations of T. Doma'nski and K.I. Wysoki'nski [Phys. Rev. B {bf 59}, 173 (1999)], who calculated the critical superconducting temperature, T_c, in function of Coulomb correlations (U) for s- and d-wave order parameter symmetries. We give physical arguments, based on general theory of perturbation, that in their gap equation the Coulomb repulsion is counted twice. Because of that, we write down the right mean-field gap equation and solve it by using a normal state one-particle Green function which gives a Mott metal-insulator transition for $T > T_c$ and which is valid for any value of U. In consequence, we are not allowed to use mean-field theory for both U and pairing (V). Our numerical results for T_c vs U shows that U is detrimental to superconductivity which agrees with the numerical results of Doma'nski and Wysoki'nski. Our results can be extended to any value of the pairing interaction if superconducting pairing fluctuations are taken into account." @default.
- W1866058727 created "2016-06-24" @default.
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- W1866058727 date "1999-03-24" @default.
- W1866058727 modified "2023-09-27" @default.
- W1866058727 title "Comment on Superconducting phases in the presence of Coulomb interaction: From weak to strong correlations''" @default.
- W1866058727 hasPublicationYear "1999" @default.
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