Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Correlated Electrons: Spin Systems and Itinerant Magnets - Frustrated Magnets I
TT 8.7: Vortrag
Montag, 31. März 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.