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TT: Fachverband Tiefe Temperaturen

TT 30: Correlated Electrons: Spin Systems and Itinerant Magnets – Frustrated Magnets 3 (jointly with MA)

TT 30.8: Talk

Tuesday, March 17, 2015, 11:30–11:45, H 0110

Raman scattering on the Honeycomb Lattice Iridates A₂IrO₃ (A=Na,Li) — Vladimir Gnezdilov^1,2, Robert Bohle¹, •Peter Lemmens¹, Soham Manni³, Friedrich Freund³, and Philipp Gegenwart³ — ¹IPKM, TU-BS, Braunschweig — ²ILTPE NAS, Ukraine — ³IP, Univ. Augsburg

Inelastic light scattering studies on single crystals of (Na_1−xLi_x)₂(Ir_1−yTi_y)O₃ (x = 0, 0.1, 0.2; y = 0, 0.025) show a polarization and temperature dependent broad band as well as phonon anomalies. We discuss these observations with respect to the relevance of the Kitaev-Heisenberg model and Majorana Fermions for A₂IrO₃.

Work supported by RTG-DFG 1953/1, Metrology for Complex Nanosystems.