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TT: Fachverband Tiefe Temperaturen

TT 8: Correlated Electrons: Spin Systems and Itinerant Magnets - Frustrated Magnets I

TT 8.7: Talk

Monday, March 31, 2014, 11:00–11:15, HSZ 304

Spiral order in Li₂IrO₃ — •Stephan Rachel¹, Johannes Reuther², and Ronny Thomale³ — ¹Institut für Theoretische Physik, TU Dresden — ²California Institute of Technology — ³Institut für Theoretische Physik, Universität Würzburg

Iridates are amongst the most interesting complex oxide materials. The non-interacting band structure of the honeycomb Iridates has been claimed to feature the quantum spin Hall effect due to large spin orbit coupling. The true materials exhibit considerable Coulomb interactions leading to different types of magnetic order (e.g., zig-zag or spiral order). Here we show how one can obtain such magnetic phases by considering the strong-coupling limit of a topological Hubbard model. In particular, we find an incommensurate phase with spiral order which is consistent with the recent experimental findings for Li₂IrO₃.