Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 38: Theory of strongly correlated systems

MA 38.2: Vortrag

Donnerstag, 15. März 2018, 10:00–10:15, H 0110

Dynamics of the magnetic moments in correlated metals: The case of Fe and Ni from ambient to Earth’s core conditions — Andreas Hausoel¹, Micheal Karolak¹, Giorgio Sangiovanni¹, Ersoy Sasioglu², Alexander Lichtenstein³, Andrey Katanin⁴, Kasten Held⁵, and •Alessandro Toschi⁵ — ¹Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074, Germany — ²Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425, Germany — ³Institut für Theoretische Physik, Universität Hamburg, 20355, Germany — ⁴Institute of Metal Physics, 620990 Ekaterinburg, Russia — ⁵Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria

The formation of localized magnetic moments and their dynamical screening represents one of the crucial ingredients for the physics of correlated metals. Their fingerprints appear, sometimes in different ways, in transport and spectroscopic experiments. As a relevant example, we present here our most recent ab-initio (DFT) + DMFT calculations [1] for two of the most common ferromagnetic elements: Fe and Ni, both at ambient and Earth’s core conditions. The comparison of the results inspires the interesting hypothesis of a more important role played by Ni for the generation of the Earth’s magnetic field, than hitherto postulated.
[1] A. Hausoel, M. Karolak, E. Sasioglu, A. Lichtenstein, K. Held, A.A. Katanin, A. Toschi, and G. Sangiovanni, Nature Communications 8, 16062 (2017).