Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 64: Frustrated Magnets - α-RuCl3 and Cu-based Materials
TT 64.2: Vortrag
Mittwoch, 14. März 2018, 15:15–15:30, HFT-FT 101
High pressure magnetization measurements in α-RuCl3 — •Gaël Bastien1, Randirley Beltrán Rodríguez1, Paula Lampen Kelley2, Steven Nagler2, Ravi Yadav3, Liviu Hozoi3, Jeroen Van den Brink3,4, Anja U B Wolter1, and Bernd Büchner1,4 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW) Dresden, 01171 Dresden, Germany — 2Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA — 3Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany — 4Department of Physics, Technical University Dresden, Helmholtzstrasse 10, 01069 Dresden, Germany.
α-RuCl3 is a promising candidate for the realization of the Kitaev quantum spin liquid. Its structure consists of honeycomb layers of Jeff=1/2 Ruthenium atoms. However at ambient pressure, α-RuCl3 shows an antiferromagnetic ground state below TN≈7K: the zig zag order. This order can be suppressed by the application of a magnetic field to induce the Kitaev quantum spin liquid ground state.
Another route to tune the magnetic properties of α−RuCl3 is the application of pressure. The magnetization under hydrostatic pressure was measured with a home built low background pressure cell down to 2K and up to 2GPa. The antiferromagnetic ground state of α-RuCl3 is indeed suppressed under pressure at Pc≈0.2GPa together with a collapse of the magnetic susceptibility for both field applied in and transverse to the basal plane. We discuss possible scenarios to explain the new pressure induced state and its origin and draw the pressure-temperature phase diagram.