期刊
PHYSICS-USPEKHI
卷 58, 期 8, 页码 733-761出版社
TURPION LTD
DOI: 10.3367/UFNe.0185.201508a.0785
关键词
anomalous superconductivity; Kohn-Luttinger mechanism; superfluidity; repulsive Fermi gas; Hubbard and t-Jmodel; Shubin Vonsovsky model; graphene monolayer; graphene bilayer
资金
- Russian Foundation for Basic Research [14-02-00058, 14-02-31237]
- Program of Basic Research of the National Research University Higher School of Economics
- President of the Russian Federation [SP-1361.2015.1]
- Dinasty Foundation
We discuss the mechanisms of unconventional superconductivity and superfluidity in 3D and 2D fermionic systems with purely repulsive interaction at low densities. We construct phase diagrams of these systems and find the areas of the superconducting state in free space, as well as on the lattice in the framework of the Fermi-gas model with hard-core repulsion, the Hubbard model, the Shubin Vonsovsky model, and the t-J model. We demonstrate that the critical superconducting temperature can be greatly increased in the spin-polarized case or in a two-band situation already at low densities. The proposed theory is based on the Kohn-Luttinger mechanism or its generalizations and explains or predicts anomalous p-, d-, and f-wave pairing in various materials, such as high-temperature superconductors, the idealized monolayer and bilayer of doped graphene, heavy-fermion systems, layered organic superconductors, superfluid He-3, spin-polarized 3He mixtures in He-4, ultracold quantum gases in magnetic traps, and optical lattices.
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