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000010562 1001_ $$0P:(DE-HGF)0$$aSchindlmayr, A.$$b0
000010562 245__ $$aFirst-Principles Calculation of Electronic Excitations in Solids with SPEX
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000010562 500__ $$aWe benefitted from useful discussions with G. Bihlmayer, M. Niesert, A. Gierlich, F. Freimuth, T. Kotani and T. Miyake. Financial support from the Deutsche Forschungsgemeinschaft through the Priority Programme 1145 and from the EU's Sixth Framework Programme through the Nanoquanta Network of Excellence (NMP4-CT-2004-500198) is gratefully acknowledged.
000010562 520__ $$aWe describe the software package SPEX, which allows first-principles calculations of quasiparticle and collective electronic excitations in solids using techniques from many-body perturbation theory. The implementation is based on the full-potential linearized augmented-plane-wave (FLAPW) method, which treats core and valence electrons on an equal footing and can be applied to a wide range of materials, including transition metals and rare earths. After a discussion of essential features that contribute to the high numerical efficiency of the code, we present illustrative results for quasiparticle band structures calculated within the GW approximation or the electronic self-energy, electron-energy-loss spectra with inter- and intraband transitions as well as local-field effects, and spin-wave spectra of itinerant ferromagnets. In all cases the inclusion of many-body correlation terms leads to very good quantitative agreement with experimental spectroscopies.
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000010562 65320 $$2Author$$aMany-Body Perturbation Theory
000010562 65320 $$2Author$$aSelf-Energy
000010562 65320 $$2Author$$aQuasiparticle Band Structure
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000010562 65320 $$2Author$$aSpin Waves
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