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PV: Plenarvorträge

PV V

PV V: Preisträgervortrag

Dienstag, 1. April 2014, 13:15–13:45, HSZ 01

Magnetism and electronic correlations in real materials — •Alexander Lichtenstein — Institut für Theoretische Physik, Universität Hamburg, 20355 Hamburg, Germany --- Laureate of the Max-Born-Prize

Effects of electron correlations in magnetic materials, including transition or rare-earth metals, superconducting oxides, and impurities on Graphene will be discussed. Modern density functional theory (DFT) describe in principle only ground state properties but not spectroscopy of the strongly correlated magnetic materials [1]. We used a "first-principle" dynamical mean field theory (DFT+DMFT) which allowed to investigate the correlations effects in real materials. In order to investigate collective non-local excitations we formulate a general framework which start from the DMFT solution for strongly correlated materials within a numerically exact continuous-time Quantum Monte Carlo impurity solver [2] and use a path integral transformation to find an optimal diagrammatic series for many-body Green functions. Prospects of theoretical description of the correlated systems with strong non-local interactions will be addressed.

[1] M.I. Katsnelson, V.Yu. Irkhin, L. Chioncel, A.I. Lichtenstein, and R.A. de Groot, Rev. Mod. Phys. 80, 315 (2008)

[2] E. Gull, A.J. Millis, A.I. Lichtenstein, A.N. Rubtsov, M.Troyer, and P. Werner, Rev. Mod. Phys. 83, 349 (2011)