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TT: Fachverband Tiefe Temperaturen

TT 56: Focus Session: Electronic Properties of Spin-Orbit Driven Oxides

TT 56.3: Topical Talk

Mittwoch, 2. April 2014, 10:30–11:00, HSZ 03

Honeycomb Lattice Iridates — •Philipp Gegenwart — Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, Germany

Iridates, in particular those crystallizing in a honeycomb structure have recently created much interest due to the proposal of new topological states such as Kitaev-Heisenberg magnet with dynamic spin liquid phase or correlated topological (quantum spin Hall) states. Experimentally, both Na₂IrO₃ and Li₂IrO₃ are Mott insulators with antiferromagnetic ground states. We report single crystal structural, microscopic and magnetic experiments in combination with band-structure calculations for variously doped honeycomb iridates to explore the possibility of tuning these systems into topological states.

Work in collaboration with Soham Manni, Friedrich Freund, Yogesh Singh, Sungkyun Choi, R. Coldea, F. Luepke, M. Wenderoth, M. Altmeyer, H.O. Jeschke, I. Mazin and R. Valenti. Financial support through DFG SPP 1666 and the Helmholtz virtual institute 521 is acknowledged.