159 citations · 1.4k across the 50 of their papers we have counts for
50 papers
Bad metal and negative compressibility transitions in a two-band Hubbard model
Raymond Fresard, Kevin Steffen, Thilo Kopp
We analyze the paramagnetic state of a two-band Hubbard model with finite Hund's coupling close to integer filling at in two spacial dimensions. Previously, a Mott metal-insu…
Combining complex and radial slave boson fields within the Kotliar-Ruckenstein representation of correlated impurities
Vu Hung Dao, Raymond Frésard
The gauge symmetry group of any slave boson representation allows to gauge away the phase of bosonic fields. One benefit of this radial field formulation is the elimination of spur…
A 3D Tight-Binding Model for La-Based Cuprate Superconductors
Raphaël Photopoulos, Raymond Frésard
Motivated by the recent experimental determination of the three-dimensional Fermi surface of overdoped La-based cuprate superconductors [Horio et al., Phys. Rev. Lett. 2018, 121, 0…
Unconventional aspects of electronic transport in delafossite oxides
Ramzy Daou, Raymond Frésard, Volker Eyert +2
The electronic transport properties of the delafossite oxides ABO are usually understood in terms of two well separated entities, namely, the triangular A and (BO)…
Charge instabilities of the two-dimensional Hubbard model with attractive nearest neighbour interaction
Raymond Fresard, Kevin Steffen, Thilo Kopp
Attractive non-local interactions jointly with repulsive local interaction in a microscopic modelling of electronic Fermi liquids generate a competition between an enhancement of t…
Exact Ground State of Strongly Correlated Electron Systems from Symmetry-Entangled Wave-Functions
A. Leprévost, O. Juillet, R. Frésard
The four-site Hubbard model is considered from the exact diagonalisation and variational method points of view. It is shown that the exact ground-state can be recovered by a symmet…