25 citations · 69 across the 5 of their papers we have counts for
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Particle-hole symmetry of charge excitation spectra in the paramagnetic phase of the Hubbard model
Vu Hung Dao, Raymond Frésard
The Kotliar and Ruckenstein slave-boson representation of the Hubbard model allows to obtain an approximation of the charge dynamical response function resulting from the Gaussian…
Effect of the next-nearest-neighbor hopping on the charge collective modes in the paramagnetic phase of the Hubbard model
Vu Hung Dao, Raymond Frésard
The charge dynamical response function of the Hubbard model is investigated on the square lattice in the thermodynamical limit. The correlation function is calculated from…
Phaseless quantum Monte-Carlo approach to strongly correlated superconductors with stochastic Hartree-Fock-Bogoliubov wavefunctions
Olivier Juillet, Alexandre Leprévost, Jérémy Bonnard +1
The so-called phaseless quantum Monte-Carlo method currently offers one of the best performing theoretical framework to investigate interacting Fermi systems. It allows to extract…
Capacitance and compressibility of heterostructures with strong electronic correlations
Kevin Steffen, Raymond Frésard, Thilo Kopp
Strong electronic correlations related to a repulsive local interaction suppress the electronic compressibility in a single-band model, and the capacitance of a corresponding metal…
Fermi-liquid Landau parameters for a nondegenerate band: Spin and charge instabilities in the extended Hubbard model
Grégoire Lhoutellier, Raymond Frésard, Andrzej M. Oleś
We investigate the Landau parameters for the instabilities in spin and charge channels in the nondegenerate extended Hubbard model with intersite Coulomb and exchange interactions.…
The Origin of Magnetic Interactions in Ca3Co2O6
Raymond Frésard, Christian Laschinger, Thilo Kopp +1
We investigate the microscopic origin of the ferromagnetic and antiferromagnetic spin exchange couplings in the quasi one-dimensional cobalt compound Ca3Co2O6. In particular, we es…