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13 papers · 1 filter
Coulomb repulsion of holes and competition between d_{x^2-y^2}-wave and s-wave parings in cuprate superconductors
V. V. Val'kov, D. M. Dzebisashvili, M. M. Korovushkin +1
The effect of the Coulomb repulsion of holes on the Cooper instability in an ensemble of spin-polaron quasiparticles has been analyzed, taking into account the peculiarities of the…
Anomalous superconductivity and superfluidity in repulsive fermion systems
M. Yu. Kagan, V. A. Mitskan, M. M. Korovushkin
We discuss the mechanisms of unconventional superconductivity and superfluidity in 3D and 2D fermionic systems with purely repulsive interaction at low densities. We construct phas…
High-T and Low-T Superconductivity in Electron Systems With Repulsion
Maxim Yu. Kagan, Vitaly A. Mitskan, Maxim M. Korovushkin
We demonstrate the instability of the normal state of purely repulsive fermionic systems towards the transition to the Kohn-Luttinger superconducting state. We construct the superc…
Effect of the long-range Coulomb interaction on phase diagram of the Kohn-Luttinger superconducting state in idealized graphene
M. Yu. Kagan, V. A. Mitskan, M. M. Korovushkin
The effect of the long-range Coulomb interaction on the realization of the Kohn-Luttinger superconductivity in idealized monolayer doped graphene is studied. It is shown that the a…
Phase diagram of the Kohn-Luttinger superconducting state for bilayer graphene
M. Yu. Kagan, V. A. Mitskan, M. M. Korovushkin
The effect of the intersite and interplane Coulomb interactions between the Dirac fermions on the formation of the Kohn-Luttinger superconductivity in bilayer doped graphene is stu…
Kohn-Luttinger superconductivity in monolayer and bilayer semimetals with the Dirac spectrum
M. Yu. Kagan, V. A. Mitskan, M. M. Korovushkin
The effect of Coulomb interaction in an ensemble of Dirac fermions on the formation of superconducting pairing in monolayer and bilayer doped graphene is studied using the Kohn-Lut…