Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 28: Correlated Electrons: Quantum-Critical Phenomena - Experiment

TT 28.3: Vortrag

Dienstag, 8. März 2016, 10:30–10:45, H21

Optical Conductivity of Layered Ruthenates: The Role of Spin-Orbit Coupling and Coulomb Anistropy — •Esmaeel Sarvestani, Guoren Zhang, Evgeny Gorelov, and Eva Pavarini — Institute for Advanced Simulation, Forschungszentrum Juelich, D-52425 Juelich, Germany

We use the combination of density functional theory and dynamical mean-field theory (LDA+DMFT) to calculate the optical conductivity of the layered ruthenates Sr₂RuO₄ and Sr₃Ru₂O₇. The calculations are performed via linear response theory and Kubo’s formalism. For Sr₂RuO₄ two sets of interaction parameters, (U,J)=(2.3,0.4)eV and (3.1,0.7)eV, both commonly employed for ruthenates, are used. We show that including the spin-orbit coupling improves the agreement with experimental data. Finally, we analyze the effects of low-symmetry Coulomb interaction.