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Bilder aus der Forschung des PGI-1/IAS-1

electron-magnon scattering  on the DFT mean-field band structure

Electron-magnon scattering in iron
The colour-coded plot shows the effect of the electron-magnon scattering on the DFT mean-field band structure (red lines). The calculation relies on first-principles many-body perturbation theory using a k-dependent self-energy developed in Jülich (so-called GT approximation). The effect is strongest in the spin-up channel (a), where the renormalization leads to a complete loss of quasiparticle character in a wide energy range. In the spin-down
channel (b), the GT renormalization gives rise to the formation of a kink structure. This structure was subsequently observed in photoemission experiments carried out at PGI-6 (red symbols).

Copyright: Forschungszentrum Jülich
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