Ayral, Thomas Werner, Philipp Biermann, Silke 2012-11-28 We present a fully self-consistent combined GW and dynamical mean field (DMFT) study of the extended two-dimensional Hubbard model. The inclusion of the local dynamical vertex stemming from the DMFT self-energy and polarization is shown to cure the known problems of self-consistent GW. We calculate momentum-resolved spectral functions, two-particle polarizations, and electron-loss spectra, as well as the effective dynamical interaction induced by nonlocal screening. The momentum-dependence introduced by GW into the extended DMFT description leads to a narrowing of the quasiparticle width and more pronounced Hubbard bands in the metallic regime as one approaches the charge-ordering transition. It further affects the shape of collective modes, giving rise to dispersive plasmon-like long-wavelength and stripe modes. application/pdf https://folia.unifr.ch/global/documents/302842 https://folia.unifr.ch/documents/302842/files/wer_spc.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.109.226401 info:eu-repo/semantics/openAccess License undefined Physical Review Letters. - 2012, vol. 109, no. 22, p. 226401 info:eu-repo/classification/udc/53 Spectral Properties of Correlated Materials: Local Vertex and Nonlocal Two-Particle Correlations from Combined GW and Dynamical Mean Field Theory http://purl.org/coar/resource_type/c_6501