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Superconductivity and ferromagnetism in the Hubbard model

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Abstract

In the framework of the Hubbard model at U → ∞, the phase transitions related to the lower underfilled subband are studied. The self-consistent equations determining the superconducting and ferromagnetic order parameters are derived in the one-loop approximation. The phase boundaries within which ferromagnetic and superconducting phenomena can coexist are discussed.

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Authors and Affiliations

  1. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow region, 141700, Russia

    R. O. Zaitsev

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  1. R. O. Zaitsev
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Correspondence to R. O. Zaitsev.

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Original Russian Text © R.O. Zaitsev, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 102, No. 8, pp. 585–590.

This term was borrowed from the Dyson theory of the spin-wave scattering [5].

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Zaitsev, R.O. Superconductivity and ferromagnetism in the Hubbard model. Jetp Lett. 102, 520–525 (2015). https://doi.org/10.1134/S0021364015200175

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  • DOI: https://doi.org/10.1134/S0021364015200175

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