Electron-electron interactions in weakly and strongly correlated solids determined by ARPES

by JÃrg H. Fink (Leibniz Institute for Solid State and Materials Research)

Monday 21 Oct 2019, 11:00 → 13:00 Europe/Rome

Sala Lauree (Dipartimento di Fisica - Ed. G.Marconi)

I will report on the determination of the energy and momentum dependence of scattering rates in various solids using angle-resolved photoemission spectroscopy. First, I will present results on the prototypical nearly-free electron metal Na. Then I will describe recent experiments on the ferromagnet Ni, from which we obtain evidence for spin dependent scattering rates due to a strong coupling to Stoner excitations. Finally, I will present studies of the momentum and energy dependent mass renormalization and scattering rates of charge carriers in various iron-based superconductors. Remarkable differences between theory and experiment will be illustrated.