Dresden 2017 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 62: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 1
TT 62.8: Talk
Thursday, March 23, 2017, 11:45–12:00, HSZ 304
Hund's exchange out of equilibrium — •Hugo Strand1, Denis Golež1, Martin Eckstein2, and Philipp Werner1 — 1Department of Physics, University of Fribourg, Fribourg, Switzerland — 2Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Hamburg, Germany
We study the canonical model for strongly correlated Hund's metals, the two band Hubbard model with local density-density and Hund's exchange interaction. Using real-time dynamical mean-field theory and a first- and second-order strong coupling expansion impurity solver we find novel dynamical features as compared to the single band model. We study the Mott insulator at half-filling and the strong influence of the local doublon spin degrees of freedom on the relaxation dynamics after an excitation pulse.