Dynamical screening in correlated metals: Spectral properties of SrVO3 in the GW approximation and beyond

Article

关键词: MOTT-HUBBARD SYSTEMS;    ELECTRON-GAS;    MASS RENORMALIZATION;    CUMULANT EXPANSION;    CA1-XSRXVO3;    CONFIGURATION;    SPECTROSCOPY;   

DOI  :  10.1103/PhysRevB.87.155147

来源: SCIE

【 摘 要 】

SrVO3 is a prototypical strongly correlated metal. Here we interpret the signatures of electronic correlation measured in photoemission spectroscopy by combining the many-body GW approximation of the self-energy with an exponential representation of the Green's function. We explain those correlation effects as the consequence of the dynamical screening of the Coulomb interaction and the coupling between elementary excitations in the solid. Moreover we address the issue of satellites for empty states and discuss the possibility of plasmon-satellite series above the Fermi energy E-F. In good agreement with experiment, we obtain from first principles the renormalization of the V 3d quasiparticle bands and the satellites close to E-F that so far have been interpreted on the basis of the Hubbard model. Finally, we identify incoherent features due to dynamical correlation also at the bottom of the O 2p bands, beyond the traditional three-band Hubbard-model description. DOI: 10.1103/PhysRevB.87.155147

【 授权许可】

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