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TT: Fachverband Tiefe Temperaturen

TT 44: Poster Session Correlated Electrons

TT 44.56: Poster

Thursday, March 17, 2011, 10:00–13:00, P1

Magnetic and Thermal properties of a Honeycomb lattice system Li₂IrO₃ — •Soham Manni, Yogesh Singh, and Philipp Gegenwart — I. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany

Recently Ir based oxides have come into prominence because the interplay between spin-orbit and electronic correlations can lead to a novel Mott insulating state. Sr₂IrO₄ and Na₂IrO₃ are two such examples.

Na₂IrO₃ is an insulator which shows frustrated magnetic interactions which lead to an antiferromagnetic ordering below T_N = 15K even though the magnetic interactions are relatively strong as seen by the Weiss temperature of θ = - 120 K.

Applying pressure is one way to tune an insulator to a metallic state. We have synthesized Li₂IrO₃ in an attempt to apply chemical pressure to Na₂IrO₃. We present results of our transport, magnetic, and thermal property measurement with emphasis on how the magnetic and transport properties change when compared to Na₂IrO₃.