The BCS theory of superconductivity named electron-phonon interaction as a glue that
overcomes Coulomb repulsion and binds fermions into pairs which then condense and …

We analyze the pairing instabilities for fermions on hexagonal lattices (both honeycomb and
triangular ones) in a wide range of fermionic densities ranging from van Hove density at …

We analyze the effect of the nonvanishing range of electron-electron repulsion on the
mechanism of unconventional superconductivity. We present asymptotically exact weak …

Emergent phenomena are the hallmark of many-body systems, and yet to unravel their
nature remains one of the central challenges in condensed-matter physics. In order to …

Many theoretical approaches find d-wave superconductivity in the prototypical one-band
Hubbard model for high-temperature superconductors. At strong coupling (U≥ W, where U …

The role of frustration and interaction strength on the half-filled Hubbard model is studied on
the square lattice with nearest-and next-nearest-neighbor hoppings t and t′ using the …

We compute the effects of electronic interactions on gapless spin-3/2 excitations that in a
noninteracting system emerge at a biquadratic touching of Kramers degenerate valence and …

We present a review of theoretical investigations into the Kohn-Luttinger nonphonon
superconductivity mechanism in various 3D and 2D repulsive electron systems described by …

The nearest-neighbor superexchange-mediated mechanism for dx 2− y 2 superconductivity
in the one-band Hubbard model faces the challenge that nearest-neighbor Coulomb …

It is expected that at weak to intermediate coupling, d-wave superconductivity can be
induced by antiferromagnetic fluctuations. However, one needs to clarify the role of Fermi …