Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 60: Correlated Electrons: f-Electron Systems

TT 60.6: Vortrag

Donnerstag, 23. März 2017, 10:45–11:00, HSZ 201

The quartet ground state in CeB₆: an inelastic x-ray scattering study — •Martin Sundermann^1,2, Kai Chen¹, Hasan Yavaş³, Zachary Fisk⁴, Maurits Haverkort^2,5, Liu Hao Tjeng², and Andrea Severing^1,2 — ¹University of Cologne, Institute of Physics II, 50937 Cologne, Germany — ²Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — ³PETRA III, Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany — ⁴Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA — ⁵present address: Institute for Theoretical Physics, Heidelberg University, 69120 Heidelberg, Germany

We investigated the ground state symmetry of the cubic hidden order compound CeB₆ by means of core level non-resonant inelastic x-ray scattering (NIXS). The information is obtained from the directional dependence of the scattering function that arises from higher than dipole transitions. Our new method confirms that the paramagnetic ground state is well described using a localized crystal-field model assuming a Γ₈ quartet ground state.