SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 46: Frustrated Magnets: Spin Liquids

TT 46.10: Vortrag

Donnerstag, 30. März 2023, 12:00–12:15, HSZ 201

Generic interplay of magnetism and structural dimerization in pressured Kitaev materials — •Bin Shen¹, Franziska Breitner¹, Angel M. Arevalo-Lopez², Danil Prishchenko³, Maximilian Seidler¹, Friedrich Freund¹, Anton Jesche¹, Philipp Gegenwart¹, and Alexander A. Tsirlin^1,4 — ¹EP VI, EKM, University of Augsburg, Germany — ²University of Lille, France — ³Yekaterinburg, Russia — ⁴Felix Bloch Institute, University of Leipzig, Germany

Quantum spin liquids in the Kitaev honeycomb model feature quantum entanglement and exotic fractionalized spin excitations, thus attracting tremendous attention. However, experimental realization of Kitaev quantum spin liquid phases in real materials has been proven difficult due to the presence of competing interactions beyond Kitaev exchange. Almost all known structurally ordered Kitaev candidate materials host a magnetically ordered ground state. Suppression of the order by various tuning parameters is currently subject of extensive investigations. We explore the possibility of suppressing magnetic order by high-pressure magnetization measurements on several Kitaev materials under hydrostatic pressure and reveal a generic interplay of magnetism and structural dimerization: Upon applying hydrostatic pressure, structural dimerization emerges and becomes visible as step in the temperature dependence of the magnetic susceptibility that shifts to higher temperatures upon further compression. We also investigate how magnetic order disappears once dimerization emerges.