Transforming nonlocality into a frequency dependence: A shortcut to spectroscopy

TitleTransforming nonlocality into a frequency dependence: A shortcut to spectroscopy
Publication TypePalaiseau Article
Acknowledgements

To be filled in

Author Address

Gatti, M (Reprint Author), Ecole Polytech, Solides Irradies Lab, CNRS, CEA DSM, F-91128 Palaiseau, France. Ecole Polytech, Solides Irradies Lab, CNRS, CEA DSM, F-91128 Palaiseau, France. CNRS, Inst Neel, F-38042 Grenoble, France. Univ Erlangen Nurnberg, Lehrstuhl Theoret Festkorperphys, D-91054 Erlangen, Germany.

DOI10.1103/PhyRevLett.99.057401
Gatti, M, Olevano, V, Reining, L, Tokatly, IV
Year of Publication2007
JournalPhys. Rev. Lett.
Volume99
URLhttp://dx.doi.org/10.1103/PhyRevLett.99.057401
Keywordspaper
Abstract

Measurable spectra are often derived from contractions of many-body Green's functions. One calculates hence more information than needed. Here we present and illustrate an in principle exact approach to construct effective potentials and kernels for the direct calculation of electronic spectra. In particular, a dynamical but local and real potential yields the spectral function needed to describe photoemission. We discuss for model solids the frequency dependence of this ``photoemission potential{''} stemming from the nonlocality of the corresponding self-energy.

Full Text
Biblio Keywords: