Regensburg 2016 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Magnetic Materials III
MA 19.4: Talk
Tuesday, March 8, 2016, 12:15–12:30, H31
Resonant inelastic x-ray scattering of magnetic excitations in the novel 5d4 iridate Ba2YIrO6 — •Maximilian Kusch1, Tusharkanti Dey1, Andrey Malyuk1, Sabine Wurmehl1, Bernd Büchner1,2, Vamshi Katukuri3, Beom Hyun Kim5, Dmitry Efremov3, Jeroen van den Brink3, Marco Moretti4, Michael Krisch4, and Jochen Geck1 — 1Institute for Solid State and Materials Research, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany — 2Institut für Festkörperphysik, Technische Universität Dresden D-01062 Dresden, Germany — 3Institute for Theoretical Solid State State Physics, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany — 4European Synchrotron Radiation Facility, B.P.220, 38043 Grenoble, France — 5Pohang university of science and technology
Ba2YIrO6 is a realization of a Ir-5d4 electronic configuration forming a J=0 ground state. Recently they gained particular interest since theoretical studies proposed, that a new type of van-Vleck like paramagnetism including excitation of non-zero J (J = 1, 2) might play an important role [khaliullin2013]. Our theoretical model calculations of the momentum dependence of these excitations predict a considerable dispersion of the J=1 and J=2 excitations and, in dependence on model parameters, a dramatic softening of excitations is observed. We performed high-resolution resonant inelastic x-ray scattering (RIXS) studies on Ba2YIrO6 to determine these dispersions experimentally. The results of these measurements are presented and discussed in comparison to the model calculations.