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Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 54: Correlated Electrons: Complex Oxides and Other Materials

TT 54.10: Vortrag

Donnerstag, 4. April 2019, 12:00–12:15, H22

Propagation of a single hole in Ca2RuO4 — •Adam Kłosiński1, Jeroen van den Brink2, Dmitri V. Efremov2, and Krzysztof Wohlfeld11Faculty of Physics, University of Warsaw, Warsaw, Poland — 2Institute for Theoretical Solid State Physics, IFW Dresden, Dresden, Germany

In recent years there has been a growing interest in the understanding of the correlated physics of Ca2RuO4, fuelled by the fundamental importance of the spin-orbit interaction in this compound on the one hand and by its close resemblance to the well-studied copper oxides on the other. In order to understand the latter, we focus here on the propagation of a single hole introduced into the Mott insulating ground state of Ca2RuO4 and verify its quantitative as well as qualitative differences w.r.t. the cuprates. To this end we introduce an effective multiorbital t-J-like model which we then solve using the linear spin wave theory and self-consistent Born approximation. We obtain the spectral function for fermionic spinless holes whose most striking feauture is its quasi-1D character.

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