Huang, Li Ayral, Thomas Biermann, Silke Werner, Philipp 2014-11-10 Using extended dynamical mean-field theory and its combination with the GW approximation, we compute the phase diagrams and local spectral functions of the single-band extended Hubbard model on the square and simple cubic lattices, considering long-range interactions up to the third nearest neighbors. The longer-range interactions shift the boundaries between the metallic, charge-ordered insulating, and Mott insulating phases, and lead to characteristic changes in the screening modes and local spectral functions. Momentum-dependent self-energy contributions enhance the correlation effects and thus compete with the additional screening effect from longer-range Coulomb interactions. Our results suggest that the influence of longer-range intersite interactions is significant, and that these effects deserve attention in realistic studies of correlated materials. application/pdf https://folia.unifr.ch/global/documents/304255 https://folia.unifr.ch/documents/304255/files/hua_edm.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.195114 info:eu-repo/semantics/openAccess License undefined Physical Review B. - 2014, vol. 90, no. 19, p. 195114 info:eu-repo/classification/udc/53 Extended dynamical mean-field study of the Hubbard model with long-range interactions http://purl.org/coar/resource_type/c_6501