Regensburg 2016 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 34: Correlated Electrons: Frustrated Magnets - Chiral Magnets & RuCl3
TT 34.7: Talk
Tuesday, March 8, 2016, 15:30–15:45, H20
Thermal conductivity of a 2D honeycomb material — •Richard Hentrich1, Keerthi Dorai Swamy Reddy1, Bernd Büchner1, Maximilian Geyer1, Anja Wolter-Giraud1, Jennifer Sears2, Young-June Kim2, Domenic Nowak3, Anna Isaeva3, Thomas Doert3, and Christian Heß1 — 1IFW Dresden, Germany — 2Department of Physics, University of Toronto, Canada — 3Inorganic Chemistry Department II, Dresden University of Technology, Germany
α-RuCl3 is a material composed of hexagonal layers of edge sharing RuCl6 octahedra in a Jeff = 1/2 state due to a combination of Coulomb repulsion and strong spin orbit coupling. This kind of spin structure is a possible realisation of the Heisenberg-Kitaev model for which theory predicts a multitude of non-trivial excitations. Thermal transport measurements are known as a valuable tool to probe elementary excitations of systems with low dimensional spin structure. We have investigated transport properties of α-RuCl 3 single crystals and found an anomalous behaviour of the heat conductivity parallel to the honeycomb planes. The clear deviation from a purely phononic signal suggests that additional excitations are contributing to heat transport.