Spin and charge modulations of a half-filled extended Hubbard model

We introduce and analyze an extended Hubbard model, in which intersite Coulomb interaction as well a staggered local potential (SLP) are considered, on the square lattice at half band filling, thermodynamic limit. Using both Hartree-Fock approximation Kotliar Ruckenstein slave boson formalism, we show that model harbors charge order (CO) joint spin modulations (SCO) finite values of SLP, while density wave (SDW) is stabilized for vanishing only. determine their phase boundaries variations parameters dependence on-site nearest-neighbor interactions. Domains coexistence CO SCO phases, suitable resistive switching experiments, unraveled. novel systematically turns into more conventional SDW when zero-SLP limit taken. also discuss nature different transitions, zero temperature. In former case, no continuous to (or SCO) transition occurs. contrast, paramagnetic (PM), accompanied with transitions towards or ordered sets A good quantitative agreement numerical simulations demonstrated, comparison between two used approaches performed.