Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 31: Frustrated Magnets - Strong Spin-Orbit Coupling 1 (joint session TT/MA)
MA 31.4: Talk
Wednesday, March 18, 2020, 10:30–10:45, HSZ 304
Pressure-dependent investigation of the elastic constants in α-RuCl3 — •A. Hauspurg1,2, S. Zherlitsyn1, T. Yanagisawa3, V. Felea1, V. Tsurkan4, K.-Y. Choi5, S.-H. Do5, and J. Wosnitza1,2 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden, Germany — 3Department of Physics, Hokkaido University, Sapporo, Japan — 4Institute of Physics, University of Augsburg, Germany — 5Department of Physics, Chung-Ang University, Seoul, South Korea
As a paradigmatic example of the realization of Kitaev physics on a honeycomb lattice, α-RuCl3 serves for numerous experimental investigations of fundamental physics of this model. Yet it shows a striped AF groundstate with evidence for a field-induced quantum spin liquid state. We performed investigations of the elastic constants by means of propagating ultrasound waves in this intriguing compound. Under variable magnetic fields, temperatures, and pressures we obtain further insight into its phase diagram. We will show evidence of pressure-dependent contributions of competing Kitaev and Heisenberg terms, which results in a suppression of the antiferromagnetically ordered phase at low temperatures.