Magnetically mediated superconductivity: Crossover from cubic to tetragonal lattice

Details Magnetically mediated superconductivity: Crossover from cubic to tetragonal lattice Magnetically mediated superconductivity: Crossover from cubic to tetragonal lattice

2002-07-23

arxiv.org/abs/cond-mat/0207556v1

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages 14 figures

Scientific paper

10.1103/PhysRevB.66.224504

We compare predictions of the mean-field theory of superconductivity for nearly antiferromagnetic and nearly ferromagnetic metals for cubic and tetragonal lattices. The calculations are based on the parametrization of an effective interaction arising from the exchange of magnetic fluctuations and assume that a single band is relevant for superconductivity. The results show that for comparable model parameters, the robustness of magnetic pairing increases gradually as one goes from a cubic structure to a more and more anisotropic tetragonal structure either on the border of antiferromagnetism or ferromagnetism.

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