Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Poster Session: Correlated Electrons 1
TT 19.24: Poster
Montag, 20. März 2017, 15:00–19:00, P2-EG
Magnetostriction and Thermal Expansion of α-RuCl3 — •Mohammad Hossein Haghighi1, Laura T. C. Bohórquez1, Anja U. B. Wolter1, Paula J. Kelley3,4, Stephen E. Nagler4, and Bernd Büchner1,2 — 1Leibniz Institute for Solid State and Materials Research, IFW Dresden, 01069 Dresden, Germany — 2Institute for Solid State Physics, TU Dresden, 01062 Dresden, Germany — 3Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA — 4Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
α-RuCl3 crystallizes in a layered honeycomb structure and has been proposed as a candidate to realize a fractionalized Kitaev model with strongly frustrated, bond-dependent, anisotropic interactions between Ru3+ magnetic moments. We report on angular dependent dilatometric measurements of α-RuCl3, probing the thermal expansion of its lattice as well as its coupling to the magnetic spins via magnetostriction experiments in a wide range of temperatures and magnetic fields. By combining the changes of the thermal expansion and the heat capacity at the magnetic transition via the Ehrenfest relation, strong and anisotropic uniaxial pressure dependencies of α-RuCl3 have been revealed.