Theoretical Study on Coexistence of Ferromagnetism and Superconductivity

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On the basis of a two-dimensional t-t' Hubbard model in ferromagnetic and paramagnetic states, the triplet superconducting mechanism is investigated by the third-order perturbation theory with respect to the on-site Coulomb interaction U. In general, the superconducting state is more stable in the paramagnetic state than in the ferromagnetic state. As a special case, the dominant ferromagnetic superconductivity is obtained by the electron-electron correlation between the electronlike majority and holelike minority bands. Furthermore, it is pointed out that in some cases the two bands play an essential role for the coexistence of superconductivity and ferromagnetism.
5 pages, 10 figures

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Strongly Correlated Electrons, Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/108484

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0603066
 http://arxiv.org/abs/cond-mat/0603066
 J. Phys. Soc. Jpn. 74 (2005) 527
 doi:10.1143/JPSJ.74.527

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arXiv