286 citations · 607 across the 16 of their papers we have counts for
16 papers
Exact functional integration of radial and complex slave-boson fields: thermodynamics and dynamics of the two-site extended Hubbard model
V. H. Dao, R. Frésard
The functional integral formulation of the Hubbard model when treated in its Kotliar-Ruckenstein representation in the radial gauge involves fermionic, as well as complex and radia…
Charge Collective Modes in Correlated Electron Systems: Plasmons Beyond the Random Phase Approximation
Loïc Philoxene, Vu Hung Dao, Raymond Frésard
Elucidating the impact of strong electronic interactions on the collective excitations of metallic systems has been of longstanding interest, mainly due to the inadequacy of the ra…
Phase coexistence in a half-filled extended Hubbard model
Loïc Philoxene, Vu-Hung Dao, Raymond Frésard
In this Letter we analyze the coexisting ordered phases that arise in the half-filled -t-U-V extended Hubbard Model on the square lattice when tackled within the Kotli…
Spin and charge modulations of a half-filled extended Hubbard model
Loïc Philoxene, Vu Hung Dao, Raymond Frésard
We introduce and analyze an extended Hubbard model, in which intersite Coulomb interaction as well as a staggered local potential (SLP) are considered, on the square lattice at hal…
Charge instabilities of the extended attractive Hubbard Model on the cubic lattice
R. Fresard, V. H. Dao
The paramagnetic phase of the extended attractive Hubbard model on the cubic lattice is studied within the spin rotation invariant Kotliar-Ruckenstein slave-boson representation at…
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…