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arXiv · 1111.3230

Superconductivity in repulsive Fermi-systems at low density

M. Yu. Kagan·D. V. Efremov·M. S. Mar'enko·V. V. Val'kov
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Abstract

In the large variety of models such as 3D and 2D Fermi-gas model with hard-core repulsion, 3D and 2D Hubbard model, and Shubin-Vonsovsky model we demonstrate the possibility of triplrt p-wave pairing at low electron density. We show that the critical temperature of the p-wave pairing can be strongly increased in a spin-polarized case or in a two-band situation already at low density and reach experimentally observable values of (1-5)K. We also discuss briefly d-wave pairing and high-Tc superconductivity with Tc~100K which arises in the t-J model in the range of parameters realistic for cuprates.

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M. Yu. Kagan, D. V. Efremov, M. S. Mar'enko, V. V. Val'kov. 2011-11-14. Superconductivity in repulsive Fermi-systems at low density. https://arxiv.org/abs/1111.3230

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