Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.77: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

Spin-Orbit Coupling and Electronic Corrleations in Ca₂RuO₄ — •Michael T. Schmid¹, Philipp Hansmann², and Maria Daghofer³ — ¹michael.schmid@fmq.uni-stuttgart.de — ²p.hansmann@fkf.mpg.de — ³maria.daghofer@fmq.uni-stuttgart.de

Transition metal oxides of the 4d and 5d series with large spin orbit coupling (SOC) such as Iridates and Ruthenates are currently under intensive investigation [1]. Especially in the 4d systems the absence of a clear hierarchy of energy scales between crystal field (CF) and SOC splittings (e.g. in Ca₂RuO₄) poses a significant challenge for standard methods like the merger of density functional theory with dynamical mean-field theory (DFT+DMFT). With state-of-the-art DMFT impurity solvers [2], however, effective low energy models that include both CF and SOC contributions can be tackled. Here we present most recent results for Ca₂RuO₄ on the level of the magnetic susceptibilities. In contrast to mere single particle spectral functions the magnetic two particle response sheds significantly more light on the nature of the correlated magnetic phases in the considered materials.
C. G. Fatuzzo et al., Phys. Rev. B, 91, 1155104 (2015)
O. Parcollet et al., Computer Physics Communications, 196, 398 (2015)