83 citations · 278 across the 13 of their papers we have counts for
13 papers
Structural study and evaluation of thermoelectric properties of single-phase isocubanite (CuFe2S3) synthesized via an ultra-fast efficient microwave radiation technique
Tristan Barbier, Bhuvanesh Srinivasan, David Berthebaud +7
The current state-of-the-art thermoelectric materials are generally composed of expensive, scarce, and toxic elements. In this respect, copper-based sulfide compounds have emerged…
Magnetoelectric properties of the multiferroic CuCrO studied by means of ab initio calculations and Monte Carlo simulations
Ahmed Albaalbaky, Yaroslav Kvashnin, Denis Ledue +2
Motivated by the discovery of multiferroicity in the geometrically frustrated triangular antiferromagnet CuCrO below its Néel temperature , we investigate its magnetic and…
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…
Impact of short-range order on transport properties of the two-dimensional metal PdCrO
Ramzy Daou, Raymond Frésard, Sylvie Hébert +1
We study the Hall and Nernst effects across the antiferromagnetic transition that reconstructs the quasi-2D Fermi surface of the metallic local moment antiferromagnet PdCrO. We…
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.…
Large anisotropic thermal conductivity of intrinsically two-dimensional metallic oxide PdCoO
Ramzy Daou, Raymond Frésard, Sylvie Hébert +1
The highly conductive layered metallic oxide \pdcoo{} is a near-perfect analogue to an alkali metal in two dimensions. It is distinguished from other two-dimensional electron syste…
Exotic spin, charge and pairing correlations of the two-dimensional doped Hubbard model: a symmetry entangled mean-field approach
Olivier Juillet, Raymond Frésard
Intertwining of spin, charge and pairing correlations in the repulsive two-dimensional Hubbard model is shown through unrestricted variational calculations, with projected wavefunc…
Mg substitution in CuCrO2 delafossite compounds
Emmanuel Guilmeau, Maria Poienar, Stefan Kremer +4
A detailed investigation of the series CuCr(1-x)MgxO2 (x = 0.0 - 0.05) has been performed by making high-temperature resistivity and thermopower measurements, and by performing a t…
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…
Magnetic and Charge Correlations of the 2-dimensional Hubbard model
Raymond Frésard, Walter Zimmermann
Using a spin-rotation invariant six-slave boson representation, we study the square lattice Hubbard model with nearest-neighbor hopping and next-nearest neighbor hopping .…