Electron-electron interactions can induce Fermi surface deformations which break the point-
group symmetry of the lattice structure of the system. In the vicinity of such a “Pomeranchuk …

We review the resonating valence bond (RVB) theory of high-temperature superconductivity
using Gutzwiller projected wave functions that incorporate strong correlations. After a …

A metallic electron system near an orientational symmetry breaking Pomeranchuk instability
is characterized by a “soft” Fermi surface with enhanced collective fluctuations. We analyze …

We analyze a mean-field model of electrons with pure forward scattering interactions on a
square lattice which exhibits spontaneous Fermi surface symmetry breaking with ad-wave …

The parent compound of high-T c cuprate superconductors is a Mott insulator described by
the Heisenberg spin–spin interaction on a square lattice. With carrier do**, the charge …

We extend the analysis of the renormalization group flow in the two-dimensional Hubbard
model close to half-filling using the recently developed temperature flow formalism. We …

Divergencies appearing in perturbation expansions of interacting many-body systems can
often be removed by expanding around a suitably chosen renormalized (instead of the …

We perform a comprehensive analysis of the dynamical magnetic susceptibility χ (q, ω) in
the slave-boson mean-field scheme of the bilayer tJ model. We use model parameters …

We analyze the influence of phonons on the dx 2− y 2-pairing instability in the Hubbard
model on the two-dimensional square lattice at weak to moderate interaction U, using a …

We analyze effective d-wave interactions in the two-dimensional extended Hubbard model
at weak coupling and small to moderate do**. The interactions are computed from a …