Superconductivity in repulsive Fermi-systems at low density
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.
Cite
@article{arxiv.1111.3230,
title = {Superconductivity in repulsive Fermi-systems at low density},
author = {M. Yu. Kagan and D. V. Efremov and M. S. Mar'enko and V. V. Val'kov},
journal= {arXiv preprint arXiv:1111.3230},
year = {2011}
}
Comments
12 pages 11 figures, accepted for publication in Journal of Superconductivity and Novel Magnetism, based on invited talks on Ginzburg conference in Zvenigorod and Vortex VII conference in Rhodes, 2011